diff --git a/packages/react-scripts/config/webpack.config.dev.js b/packages/react-scripts/config/webpack.config.dev.js
deleted file mode 100644
index 60e6b725b..000000000
--- a/packages/react-scripts/config/webpack.config.dev.js
+++ /dev/null
@@ -1,423 +0,0 @@
-// @remove-on-eject-begin
-/**
- * Copyright (c) 2015-present, Facebook, Inc.
- *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
- */
-// @remove-on-eject-end
-'use strict';
-
-const fs = require('fs');
-const path = require('path');
-const resolve = require('resolve');
-const webpack = require('webpack');
-const PnpWebpackPlugin = require('pnp-webpack-plugin');
-const HtmlWebpackPlugin = require('html-webpack-plugin');
-const CaseSensitivePathsPlugin = require('case-sensitive-paths-webpack-plugin');
-const InterpolateHtmlPlugin = require('react-dev-utils/InterpolateHtmlPlugin');
-const WatchMissingNodeModulesPlugin = require('react-dev-utils/WatchMissingNodeModulesPlugin');
-const ModuleScopePlugin = require('react-dev-utils/ModuleScopePlugin');
-const getCSSModuleLocalIdent = require('react-dev-utils/getCSSModuleLocalIdent');
-const getClientEnvironment = require('./env');
-const paths = require('./paths');
-const ManifestPlugin = require('webpack-manifest-plugin');
-const ModuleNotFoundPlugin = require('react-dev-utils/ModuleNotFoundPlugin');
-const ForkTsCheckerWebpackPlugin = require('fork-ts-checker-webpack-plugin-alt');
-const typescriptFormatter = require('react-dev-utils/typescriptFormatter');
-// @remove-on-eject-begin
-const getCacheIdentifier = require('react-dev-utils/getCacheIdentifier');
-// @remove-on-eject-end
-
-// Webpack uses `publicPath` to determine where the app is being served from.
-// In development, we always serve from the root. This makes config easier.
-const publicPath = '/';
-// `publicUrl` is just like `publicPath`, but we will provide it to our app
-// as %PUBLIC_URL% in `index.html` and `process.env.PUBLIC_URL` in JavaScript.
-// Omit trailing slash as %PUBLIC_PATH%/xyz looks better than %PUBLIC_PATH%xyz.
-const publicUrl = '';
-// Get environment variables to inject into our app.
-const env = getClientEnvironment(publicUrl);
-
-// Check if TypeScript is setup
-const useTypeScript = fs.existsSync(paths.appTsConfig);
-
-// style files regexes
-const cssRegex = /\.css$/;
-const cssModuleRegex = /\.module\.css$/;
-const sassRegex = /\.(scss|sass)$/;
-const sassModuleRegex = /\.module\.(scss|sass)$/;
-
-// common function to get style loaders
-const getStyleLoaders = (cssOptions, preProcessor) => {
-  const loaders = [
-    require.resolve('style-loader'),
-    {
-      loader: require.resolve('css-loader'),
-      options: cssOptions,
-    },
-    // See postcss.config.js for options & plugins
-    require.resolve('postcss-loader'),
-  ];
-  if (preProcessor) {
-    loaders.push(require.resolve(preProcessor));
-  }
-  return loaders;
-};
-
-// This is the development configuration.
-// It is focused on developer experience and fast rebuilds.
-// The production configuration is different and lives in a separate file.
-module.exports = {
-  mode: 'development',
-  // You may want 'eval' instead if you prefer to see the compiled output in DevTools.
-  // See the discussion in https://github.com/facebook/create-react-app/issues/343
-  devtool: 'cheap-module-source-map',
-  // These are the "entry points" to our application.
-  // This means they will be the "root" imports that are included in JS bundle.
-  entry: [
-    // Include an alternative client for WebpackDevServer. A client's job is to
-    // connect to WebpackDevServer by a socket and get notified about changes.
-    // When you save a file, the client will either apply hot updates (in case
-    // of CSS changes), or refresh the page (in case of JS changes). When you
-    // make a syntax error, this client will display a syntax error overlay.
-    // Note: instead of the default WebpackDevServer client, we use a custom one
-    // to bring better experience for Create React App users. You can replace
-    // the line below with these two lines if you prefer the stock client:
-    // require.resolve('webpack-dev-server/client') + '?/',
-    // require.resolve('webpack/hot/dev-server'),
-    require.resolve('react-dev-utils/webpackHotDevClient'),
-    // Finally, this is your app's code:
-    paths.appIndexJs,
-    // We include the app code last so that if there is a runtime error during
-    // initialization, it doesn't blow up the WebpackDevServer client, and
-    // changing JS code would still trigger a refresh.
-  ],
-  output: {
-    // Add /* filename */ comments to generated require()s in the output.
-    pathinfo: true,
-    // This does not produce a real file. It's just the virtual path that is
-    // served by WebpackDevServer in development. This is the JS bundle
-    // containing code from all our entry points, and the Webpack runtime.
-    filename: 'static/js/bundle.js',
-    // There are also additional JS chunk files if you use code splitting.
-    chunkFilename: 'static/js/[name].chunk.js',
-    // This is the URL that app is served from. We use "/" in development.
-    publicPath: publicPath,
-    // Point sourcemap entries to original disk location (format as URL on Windows)
-    devtoolModuleFilenameTemplate: info =>
-      path.resolve(info.absoluteResourcePath).replace(/\\/g, '/'),
-  },
-  optimization: {
-    // Automatically split vendor and commons
-    // https://twitter.com/wSokra/status/969633336732905474
-    // https://medium.com/webpack/webpack-4-code-splitting-chunk-graph-and-the-splitchunks-optimization-be739a861366
-    splitChunks: {
-      chunks: 'all',
-      name: false,
-    },
-    // Keep the runtime chunk seperated to enable long term caching
-    // https://twitter.com/wSokra/status/969679223278505985
-    runtimeChunk: true,
-  },
-  resolve: {
-    // This allows you to set a fallback for where Webpack should look for modules.
-    // We placed these paths second because we want `node_modules` to "win"
-    // if there are any conflicts. This matches Node resolution mechanism.
-    // https://github.com/facebook/create-react-app/issues/253
-    modules: ['node_modules'].concat(
-      // It is guaranteed to exist because we tweak it in `env.js`
-      process.env.NODE_PATH.split(path.delimiter).filter(Boolean)
-    ),
-    // These are the reasonable defaults supported by the Node ecosystem.
-    // We also include JSX as a common component filename extension to support
-    // some tools, although we do not recommend using it, see:
-    // https://github.com/facebook/create-react-app/issues/290
-    // `web` extension prefixes have been added for better support
-    // for React Native Web.
-    extensions: paths.moduleFileExtensions
-      .map(ext => `.${ext}`)
-      .filter(ext => useTypeScript || !ext.includes('ts')),
-    alias: {
-      // Support React Native Web
-      // https://www.smashingmagazine.com/2016/08/a-glimpse-into-the-future-with-react-native-for-web/
-      'react-native': 'react-native-web',
-    },
-    plugins: [
-      // Adds support for installing with Plug'n'Play, leading to faster installs and adding
-      // guards against forgotten dependencies and such.
-      PnpWebpackPlugin,
-      // Prevents users from importing files from outside of src/ (or node_modules/).
-      // This often causes confusion because we only process files within src/ with babel.
-      // To fix this, we prevent you from importing files out of src/ -- if you'd like to,
-      // please link the files into your node_modules/ and let module-resolution kick in.
-      // Make sure your source files are compiled, as they will not be processed in any way.
-      new ModuleScopePlugin(paths.appSrc, [paths.appPackageJson]),
-    ],
-  },
-  resolveLoader: {
-    plugins: [
-      // Also related to Plug'n'Play, but this time it tells Webpack to load its loaders
-      // from the current package.
-      PnpWebpackPlugin.moduleLoader(module),
-    ],
-  },
-  module: {
-    strictExportPresence: true,
-    rules: [
-      // Disable require.ensure as it's not a standard language feature.
-      { parser: { requireEnsure: false } },
-
-      // First, run the linter.
-      // It's important to do this before Babel processes the JS.
-      {
-        test: /\.(js|mjs|jsx)$/,
-        enforce: 'pre',
-        use: [
-          {
-            options: {
-              formatter: require.resolve('react-dev-utils/eslintFormatter'),
-              eslintPath: require.resolve('eslint'),
-            },
-            loader: require.resolve('eslint-loader'),
-          },
-        ],
-        include: paths.appSrc,
-      },
-      {
-        // "oneOf" will traverse all following loaders until one will
-        // match the requirements. When no loader matches it will fall
-        // back to the "file" loader at the end of the loader list.
-        oneOf: [
-          // "url" loader works like "file" loader except that it embeds assets
-          // smaller than specified limit in bytes as data URLs to avoid requests.
-          // A missing `test` is equivalent to a match.
-          {
-            test: [/\.bmp$/, /\.gif$/, /\.jpe?g$/, /\.png$/],
-            loader: require.resolve('url-loader'),
-            options: {
-              limit: 10000,
-              name: 'static/media/[name].[hash:8].[ext]',
-            },
-          },
-          // Process application JS with Babel.
-          // The preset includes JSX, Flow, and some ESnext features.
-          {
-            test: /\.(js|mjs|jsx|ts|tsx)$/,
-            include: paths.appSrc,
-            loader: require.resolve('babel-loader'),
-            options: {
-              customize: require.resolve(
-                'babel-preset-react-app/webpack-overrides'
-              ),
-              // @remove-on-eject-begin
-              // Make sure we have a unique cache identifier, erring on the
-              // side of caution.
-              // We remove this when the user ejects because the default
-              // is sane and uses Babel options. Instead of options, we use
-              // the react-scripts and babel-preset-react-app versions.
-              cacheIdentifier: getCacheIdentifier('development', [
-                'babel-preset-react-app',
-                'react-dev-utils',
-                'react-scripts',
-              ]),
-              // @remove-on-eject-end
-              // This is a feature of `babel-loader` for webpack (not Babel itself).
-              // It enables caching results in ./node_modules/.cache/babel-loader/
-              // directory for faster rebuilds.
-              cacheDirectory: true,
-              // Don't waste time on Gzipping the cache
-              cacheCompression: false,
-            },
-          },
-          // Process any JS outside of the app with Babel.
-          // Unlike the application JS, we only compile the standard ES features.
-          {
-            test: /\.(js|mjs)$/,
-            exclude: /@babel(?:\/|\\{1,2})runtime/,
-            loader: require.resolve('babel-loader'),
-            options: {
-              babelrc: false,
-              configFile: false,
-              compact: false,
-              presets: [
-                [
-                  require.resolve('babel-preset-react-app/dependencies'),
-                  { helpers: true },
-                ],
-              ],
-              cacheDirectory: true,
-              // Don't waste time on Gzipping the cache
-              cacheCompression: false,
-              // @remove-on-eject-begin
-              cacheIdentifier: getCacheIdentifier('development', [
-                'babel-preset-react-app',
-                'react-dev-utils',
-                'react-scripts',
-              ]),
-              // @remove-on-eject-end
-              // If an error happens in a package, it's possible to be
-              // because it was compiled. Thus, we don't want the browser
-              // debugger to show the original code. Instead, the code
-              // being evaluated would be much more helpful.
-              sourceMaps: false,
-            },
-          },
-          // "postcss" loader applies autoprefixer to our CSS.
-          // "css" loader resolves paths in CSS and adds assets as dependencies.
-          // "style" loader turns CSS into JS modules that inject <style> tags.
-          // In production, we use a plugin to extract that CSS to a file, but
-          // in development "style" loader enables hot editing of CSS.
-          // By default we support CSS Modules with the extension .module.css
-          {
-            test: cssRegex,
-            exclude: cssModuleRegex,
-            use: getStyleLoaders({
-              importLoaders: 1,
-            }),
-          },
-          // Adds support for CSS Modules (https://github.com/css-modules/css-modules)
-          // using the extension .module.css
-          {
-            test: cssModuleRegex,
-            use: getStyleLoaders({
-              importLoaders: 1,
-              modules: true,
-              getLocalIdent: getCSSModuleLocalIdent,
-            }),
-          },
-          // Opt-in support for SASS (using .scss or .sass extensions).
-          // Chains the sass-loader with the css-loader and the style-loader
-          // to immediately apply all styles to the DOM.
-          // By default we support SASS Modules with the
-          // extensions .module.scss or .module.sass
-          {
-            test: sassRegex,
-            exclude: sassModuleRegex,
-            use: getStyleLoaders({ importLoaders: 2 }, 'sass-loader'),
-          },
-          // Adds support for CSS Modules, but using SASS
-          // using the extension .module.scss or .module.sass
-          {
-            test: sassModuleRegex,
-            use: getStyleLoaders(
-              {
-                importLoaders: 2,
-                modules: true,
-                getLocalIdent: getCSSModuleLocalIdent,
-              },
-              'sass-loader'
-            ),
-          },
-          // The GraphQL loader preprocesses GraphQL queries in .graphql files.
-          {
-            test: /\.(graphql)$/,
-            loader: 'graphql-tag/loader',
-          },
-          // "file" loader makes sure those assets get served by WebpackDevServer.
-          // When you `import` an asset, you get its (virtual) filename.
-          // In production, they would get copied to the `build` folder.
-          // This loader doesn't use a "test" so it will catch all modules
-          // that fall through the other loaders.
-          {
-            // Exclude `js` files to keep "css" loader working as it injects
-            // its runtime that would otherwise be processed through "file" loader.
-            // Also exclude `html` and `json` extensions so they get processed
-            // by webpacks internal loaders.
-            exclude: [/\.(js|mjs|jsx|ts|tsx)$/, /\.html$/, /\.json$/],
-            loader: require.resolve('file-loader'),
-            options: {
-              name: 'static/media/[name].[hash:8].[ext]',
-            },
-          },
-        ],
-      },
-      // ** STOP ** Are you adding a new loader?
-      // Make sure to add the new loader(s) before the "file" loader.
-    ],
-  },
-  plugins: [
-    // Generates an `index.html` file with the <script> injected.
-    new HtmlWebpackPlugin({
-      inject: true,
-      template: paths.appHtml,
-    }),
-    // Makes some environment variables available in index.html.
-    // The public URL is available as %PUBLIC_URL% in index.html, e.g.:
-    // <link rel="shortcut icon" href="%PUBLIC_URL%/favicon.ico">
-    // In development, this will be an empty string.
-    new InterpolateHtmlPlugin(HtmlWebpackPlugin, env.raw),
-    // This gives some necessary context to module not found errors, such as
-    // the requesting resource.
-    new ModuleNotFoundPlugin(paths.appPath),
-    // Makes some environment variables available to the JS code, for example:
-    // if (process.env.NODE_ENV === 'development') { ... }. See `./env.js`.
-    new webpack.DefinePlugin(env.stringified),
-    // This is necessary to emit hot updates (currently CSS only):
-    new webpack.HotModuleReplacementPlugin(),
-    // Watcher doesn't work well if you mistype casing in a path so we use
-    // a plugin that prints an error when you attempt to do this.
-    // See https://github.com/facebook/create-react-app/issues/240
-    new CaseSensitivePathsPlugin(),
-    // If you require a missing module and then `npm install` it, you still have
-    // to restart the development server for Webpack to discover it. This plugin
-    // makes the discovery automatic so you don't have to restart.
-    // See https://github.com/facebook/create-react-app/issues/186
-    new WatchMissingNodeModulesPlugin(paths.appNodeModules),
-    // Moment.js is an extremely popular library that bundles large locale files
-    // by default due to how Webpack interprets its code. This is a practical
-    // solution that requires the user to opt into importing specific locales.
-    // https://github.com/jmblog/how-to-optimize-momentjs-with-webpack
-    // You can remove this if you don't use Moment.js:
-    new webpack.IgnorePlugin(/^\.\/locale$/, /moment$/),
-    // Generate a manifest file which contains a mapping of all asset filenames
-    // to their corresponding output file so that tools can pick it up without
-    // having to parse `index.html`.
-    new ManifestPlugin({
-      fileName: 'asset-manifest.json',
-      publicPath: publicPath,
-    }),
-    // TypeScript type checking
-    useTypeScript &&
-      new ForkTsCheckerWebpackPlugin({
-        typescript: resolve.sync('typescript', {
-          basedir: paths.appNodeModules,
-        }),
-        async: false,
-        checkSyntacticErrors: true,
-        tsconfig: paths.appTsConfig,
-        compilerOptions: {
-          module: 'esnext',
-          moduleResolution: 'node',
-          resolveJsonModule: true,
-          isolatedModules: true,
-          noEmit: true,
-          jsx: 'preserve',
-        },
-        reportFiles: [
-          '**',
-          '!**/*.json',
-          '!**/__tests__/**',
-          '!**/?(*.)(spec|test).*',
-          '!src/setupProxy.js',
-          '!src/setupTests.*',
-        ],
-        watch: paths.appSrc,
-        silent: true,
-        formatter: typescriptFormatter,
-      }),
-  ].filter(Boolean),
-
-  // Some libraries import Node modules but don't use them in the browser.
-  // Tell Webpack to provide empty mocks for them so importing them works.
-  node: {
-    dgram: 'empty',
-    fs: 'empty',
-    net: 'empty',
-    tls: 'empty',
-    child_process: 'empty',
-  },
-  // Turn off performance processing because we utilize
-  // our own hints via the FileSizeReporter
-  performance: false,
-};
diff --git a/packages/react-scripts/config/webpack.config.js b/packages/react-scripts/config/webpack.config.js
new file mode 100644
index 000000000..daf2e65f2
--- /dev/null
+++ b/packages/react-scripts/config/webpack.config.js
@@ -0,0 +1,601 @@
+// @remove-on-eject-begin
+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+// @remove-on-eject-end
+'use strict';
+
+const fs = require('fs');
+const path = require('path');
+const webpack = require('webpack');
+const resolve = require('resolve');
+const PnpWebpackPlugin = require('pnp-webpack-plugin');
+const HtmlWebpackPlugin = require('html-webpack-plugin');
+const CaseSensitivePathsPlugin = require('case-sensitive-paths-webpack-plugin');
+const InlineChunkHtmlPlugin = require('react-dev-utils/InlineChunkHtmlPlugin');
+const TerserPlugin = require('terser-webpack-plugin');
+const MiniCssExtractPlugin = require('mini-css-extract-plugin');
+const OptimizeCSSAssetsPlugin = require('optimize-css-assets-webpack-plugin');
+const safePostCssParser = require('postcss-safe-parser');
+const ManifestPlugin = require('webpack-manifest-plugin');
+const InterpolateHtmlPlugin = require('react-dev-utils/InterpolateHtmlPlugin');
+const WatchMissingNodeModulesPlugin = require('react-dev-utils/WatchMissingNodeModulesPlugin');
+const ModuleScopePlugin = require('react-dev-utils/ModuleScopePlugin');
+const getCSSModuleLocalIdent = require('react-dev-utils/getCSSModuleLocalIdent');
+const paths = require('./paths');
+const getClientEnvironment = require('./env');
+const ModuleNotFoundPlugin = require('react-dev-utils/ModuleNotFoundPlugin');
+const ForkTsCheckerWebpackPlugin = require('fork-ts-checker-webpack-plugin-alt');
+const typescriptFormatter = require('react-dev-utils/typescriptFormatter');
+// @remove-on-eject-begin
+const getCacheIdentifier = require('react-dev-utils/getCacheIdentifier');
+// @remove-on-eject-end
+
+// Source maps are resource heavy and can cause out of memory issue for large source files.
+const shouldUseSourceMap = process.env.GENERATE_SOURCEMAP !== 'false';
+// Some apps do not need the benefits of saving a web request, so not inlining the chunk
+// makes for a smoother build process.
+const shouldInlineRuntimeChunk = process.env.INLINE_RUNTIME_CHUNK !== 'false';
+
+// Check if TypeScript is setup
+const useTypeScript = fs.existsSync(paths.appTsConfig);
+
+// style files regexes
+const cssRegex = /\.css$/;
+const cssModuleRegex = /\.module\.css$/;
+const sassRegex = /\.(scss|sass)$/;
+const sassModuleRegex = /\.module\.(scss|sass)$/;
+
+// This is the production and development configuration.
+// It is focused on developer experience, fast rebuilds, and a minimal bundle.
+module.exports = function(webpackEnv) {
+  const isEnvDevelopment = webpackEnv === 'development';
+  const isEnvProduction = webpackEnv === 'production';
+
+  // Webpack uses `publicPath` to determine where the app is being served from.
+  // It requires a trailing slash, or the file assets will get an incorrect path.
+  // In development, we always serve from the root. This makes config easier.
+  const publicPath = isEnvProduction
+    ? paths.servedPath
+    : isEnvDevelopment && '/';
+  // Some apps do not use client-side routing with pushState.
+  // For these, "homepage" can be set to "." to enable relative asset paths.
+  const shouldUseRelativeAssetPaths = publicPath === './';
+
+  // `publicUrl` is just like `publicPath`, but we will provide it to our app
+  // as %PUBLIC_URL% in `index.html` and `process.env.PUBLIC_URL` in JavaScript.
+  // Omit trailing slash as %PUBLIC_URL%/xyz looks better than %PUBLIC_URL%xyz.
+  const publicUrl = isEnvProduction
+    ? publicPath.slice(0, -1)
+    : isEnvDevelopment && '';
+  // Get environment variables to inject into our app.
+  const env = getClientEnvironment(publicUrl);
+
+  // common function to get style loaders
+  const getStyleLoaders = (cssOptions, preProcessor) => {
+    const loaders = [
+      isEnvDevelopment && require.resolve('style-loader'),
+      isEnvProduction && {
+        loader: MiniCssExtractPlugin.loader,
+        options: Object.assign(
+          {},
+          shouldUseRelativeAssetPaths ? { publicPath: '../../' } : undefined
+        ),
+      },
+      {
+        loader: require.resolve('css-loader'),
+        options: cssOptions,
+      },
+      {
+        // Options for PostCSS as we reference these options twice
+        // Adds vendor prefixing based on your specified browser support in
+        // package.json
+        loader: require.resolve('postcss-loader'),
+        options: {
+          sourceMap: isEnvProduction && shouldUseSourceMap,
+        },
+      },
+    ].filter(Boolean);
+    if (preProcessor) {
+      loaders.push({
+        loader: require.resolve(preProcessor),
+        options: {
+          sourceMap: isEnvProduction && shouldUseSourceMap,
+        },
+      });
+    }
+    return loaders;
+  };
+
+  return {
+    mode: isEnvProduction ? 'production' : isEnvDevelopment && 'development',
+    // Stop compilation early in production
+    bail: isEnvProduction,
+    devtool: isEnvProduction
+      ? shouldUseSourceMap
+        ? 'source-map'
+        : false
+      : isEnvDevelopment && 'cheap-module-source-map',
+    // These are the "entry points" to our application.
+    // This means they will be the "root" imports that are included in JS bundle.
+    entry: [
+      // Include an alternative client for WebpackDevServer. A client's job is to
+      // connect to WebpackDevServer by a socket and get notified about changes.
+      // When you save a file, the client will either apply hot updates (in case
+      // of CSS changes), or refresh the page (in case of JS changes). When you
+      // make a syntax error, this client will display a syntax error overlay.
+      // Note: instead of the default WebpackDevServer client, we use a custom one
+      // to bring better experience for Create React App users. You can replace
+      // the line below with these two lines if you prefer the stock client:
+      // require.resolve('webpack-dev-server/client') + '?/',
+      // require.resolve('webpack/hot/dev-server'),
+      isEnvDevelopment &&
+        require.resolve('react-dev-utils/webpackHotDevClient'),
+      // Finally, this is your app's code:
+      paths.appIndexJs,
+      // We include the app code last so that if there is a runtime error during
+      // initialization, it doesn't blow up the WebpackDevServer client, and
+      // changing JS code would still trigger a refresh.
+    ].filter(Boolean),
+    output: {
+      // The build folder.
+      path: isEnvProduction ? paths.appBuild : undefined,
+      // Add /* filename */ comments to generated require()s in the output.
+      pathinfo: isEnvDevelopment,
+      // There will be one main bundle, and one file per asynchronous chunk.
+      // In development, it does not produce real files.
+      filename: isEnvProduction
+        ? 'static/js/[name].[chunkhash:8].js'
+        : isEnvDevelopment && 'static/js/bundle.js',
+      // There are also additional JS chunk files if you use code splitting.
+      chunkFilename: isEnvProduction
+        ? 'static/js/[name].[chunkhash:8].chunk.js'
+        : isEnvDevelopment && 'static/js/[name].chunk.js',
+      // We inferred the "public path" (such as / or /my-project) from homepage.
+      // We use "/" in development.
+      publicPath: publicPath,
+      // Point sourcemap entries to original disk location (format as URL on Windows)
+      devtoolModuleFilenameTemplate: isEnvProduction
+        ? info =>
+            path
+              .relative(paths.appSrc, info.absoluteResourcePath)
+              .replace(/\\/g, '/')
+        : isEnvDevelopment &&
+          (info => path.resolve(info.absoluteResourcePath).replace(/\\/g, '/')),
+    },
+    optimization: {
+      minimize: isEnvProduction,
+      minimizer: [
+        // This is only used in production mode
+        new TerserPlugin({
+          terserOptions: {
+            parse: {
+              // we want terser to parse ecma 8 code. However, we don't want it
+              // to apply any minfication steps that turns valid ecma 5 code
+              // into invalid ecma 5 code. This is why the 'compress' and 'output'
+              // sections only apply transformations that are ecma 5 safe
+              // https://github.com/facebook/create-react-app/pull/4234
+              ecma: 8,
+            },
+            compress: {
+              ecma: 5,
+              warnings: false,
+              // Disabled because of an issue with Uglify breaking seemingly valid code:
+              // https://github.com/facebook/create-react-app/issues/2376
+              // Pending further investigation:
+              // https://github.com/mishoo/UglifyJS2/issues/2011
+              comparisons: false,
+              // Disabled because of an issue with Terser breaking valid code:
+              // https://github.com/facebook/create-react-app/issues/5250
+              // Pending futher investigation:
+              // https://github.com/terser-js/terser/issues/120
+              inline: 2,
+            },
+            mangle: {
+              safari10: true,
+            },
+            output: {
+              ecma: 5,
+              comments: false,
+              // Turned on because emoji and regex is not minified properly using default
+              // https://github.com/facebook/create-react-app/issues/2488
+              ascii_only: true,
+            },
+          },
+          // Use multi-process parallel running to improve the build speed
+          // Default number of concurrent runs: os.cpus().length - 1
+          parallel: true,
+          // Enable file caching
+          cache: true,
+          sourceMap: shouldUseSourceMap,
+        }),
+        // This is only used in production mode
+        new OptimizeCSSAssetsPlugin({
+          cssProcessorOptions: {
+            parser: safePostCssParser,
+            map: shouldUseSourceMap
+              ? {
+                  // `inline: false` forces the sourcemap to be output into a
+                  // separate file
+                  inline: false,
+                  // `annotation: true` appends the sourceMappingURL to the end of
+                  // the css file, helping the browser find the sourcemap
+                  annotation: true,
+                }
+              : false,
+          },
+        }),
+      ],
+      // Automatically split vendor and commons
+      // https://twitter.com/wSokra/status/969633336732905474
+      // https://medium.com/webpack/webpack-4-code-splitting-chunk-graph-and-the-splitchunks-optimization-be739a861366
+      splitChunks: {
+        chunks: 'all',
+        name: false,
+      },
+      // Keep the runtime chunk seperated to enable long term caching
+      // https://twitter.com/wSokra/status/969679223278505985
+      runtimeChunk: true,
+    },
+    resolve: {
+      // This allows you to set a fallback for where Webpack should look for modules.
+      // We placed these paths second because we want `node_modules` to "win"
+      // if there are any conflicts. This matches Node resolution mechanism.
+      // https://github.com/facebook/create-react-app/issues/253
+      modules: ['node_modules'].concat(
+        // It is guaranteed to exist because we tweak it in `env.js`
+        process.env.NODE_PATH.split(path.delimiter).filter(Boolean)
+      ),
+      // These are the reasonable defaults supported by the Node ecosystem.
+      // We also include JSX as a common component filename extension to support
+      // some tools, although we do not recommend using it, see:
+      // https://github.com/facebook/create-react-app/issues/290
+      // `web` extension prefixes have been added for better support
+      // for React Native Web.
+      extensions: paths.moduleFileExtensions
+        .map(ext => `.${ext}`)
+        .filter(ext => useTypeScript || !ext.includes('ts')),
+      alias: {
+        // Support React Native Web
+        // https://www.smashingmagazine.com/2016/08/a-glimpse-into-the-future-with-react-native-for-web/
+        'react-native': 'react-native-web',
+      },
+      plugins: [
+        // Adds support for installing with Plug'n'Play, leading to faster installs and adding
+        // guards against forgotten dependencies and such.
+        PnpWebpackPlugin,
+        // Prevents users from importing files from outside of src/ (or node_modules/).
+        // This often causes confusion because we only process files within src/ with babel.
+        // To fix this, we prevent you from importing files out of src/ -- if you'd like to,
+        // please link the files into your node_modules/ and let module-resolution kick in.
+        // Make sure your source files are compiled, as they will not be processed in any way.
+        new ModuleScopePlugin(paths.appSrc, [paths.appPackageJson]),
+      ],
+    },
+    resolveLoader: {
+      plugins: [
+        // Also related to Plug'n'Play, but this time it tells Webpack to load its loaders
+        // from the current package.
+        PnpWebpackPlugin.moduleLoader(module),
+      ],
+    },
+    module: {
+      strictExportPresence: true,
+      rules: [
+        // Disable require.ensure as it's not a standard language feature.
+        { parser: { requireEnsure: false } },
+
+        // First, run the linter.
+        // It's important to do this before Babel processes the JS.
+        {
+          test: /\.(js|mjs|jsx)$/,
+          enforce: 'pre',
+          use: [
+            {
+              options: {
+                formatter: require.resolve('react-dev-utils/eslintFormatter'),
+                eslintPath: require.resolve('eslint'),
+              },
+              loader: require.resolve('eslint-loader'),
+            },
+          ],
+          include: paths.appSrc,
+        },
+        {
+          // "oneOf" will traverse all following loaders until one will
+          // match the requirements. When no loader matches it will fall
+          // back to the "file" loader at the end of the loader list.
+          oneOf: [
+            // "url" loader works like "file" loader except that it embeds assets
+            // smaller than specified limit in bytes as data URLs to avoid requests.
+            // A missing `test` is equivalent to a match.
+            {
+              test: [/\.bmp$/, /\.gif$/, /\.jpe?g$/, /\.png$/],
+              loader: require.resolve('url-loader'),
+              options: {
+                limit: 10000,
+                name: 'static/media/[name].[hash:8].[ext]',
+              },
+            },
+            // Process application JS with Babel.
+            // The preset includes JSX, Flow, TypeScript, and some ESnext features.
+            {
+              test: /\.(js|mjs|jsx|ts|tsx)$/,
+              include: paths.appSrc,
+              loader: require.resolve('babel-loader'),
+              options: {
+                customize: require.resolve(
+                  'babel-preset-react-app/webpack-overrides'
+                ),
+                // @remove-on-eject-begin
+                // Make sure we have a unique cache identifier, erring on the
+                // side of caution.
+                // We remove this when the user ejects because the default
+                // is sane and uses Babel options. Instead of options, we use
+                // the react-scripts and babel-preset-react-app versions.
+                cacheIdentifier: getCacheIdentifier(
+                  isEnvProduction
+                    ? 'production'
+                    : isEnvDevelopment && 'development',
+                  ['babel-preset-react-app', 'react-dev-utils', 'react-scripts']
+                ),
+                // @remove-on-eject-end
+                // This is a feature of `babel-loader` for webpack (not Babel itself).
+                // It enables caching results in ./node_modules/.cache/babel-loader/
+                // directory for faster rebuilds.
+                cacheDirectory: true,
+                cacheCompression: isEnvProduction,
+                compact: isEnvProduction,
+              },
+            },
+            // Process any JS outside of the app with Babel.
+            // Unlike the application JS, we only compile the standard ES features.
+            {
+              test: /\.(js|mjs)$/,
+              exclude: /@babel(?:\/|\\{1,2})runtime/,
+              loader: require.resolve('babel-loader'),
+              options: {
+                babelrc: false,
+                configFile: false,
+                compact: false,
+                presets: [
+                  [
+                    require.resolve('babel-preset-react-app/dependencies'),
+                    { helpers: true },
+                  ],
+                ],
+                cacheDirectory: true,
+                cacheCompression: isEnvProduction,
+                // @remove-on-eject-begin
+                cacheIdentifier: getCacheIdentifier(
+                  isEnvProduction
+                    ? 'production'
+                    : isEnvDevelopment && 'development',
+                  ['babel-preset-react-app', 'react-dev-utils', 'react-scripts']
+                ),
+                // @remove-on-eject-end
+                // If an error happens in a package, it's possible to be
+                // because it was compiled. Thus, we don't want the browser
+                // debugger to show the original code. Instead, the code
+                // being evaluated would be much more helpful.
+                sourceMaps: false,
+              },
+            },
+            // "postcss" loader applies autoprefixer to our CSS.
+            // "css" loader resolves paths in CSS and adds assets as dependencies.
+            // "style" loader turns CSS into JS modules that inject <style> tags.
+            // In production, we use MiniCSSExtractPlugin to extract that CSS
+            // to a file, but in development "style" loader enables hot editing
+            // of CSS.
+            // By default we support CSS Modules with the extension .module.css
+            {
+              test: cssRegex,
+              exclude: cssModuleRegex,
+              use: getStyleLoaders({
+                importLoaders: 1,
+                sourceMap: isEnvProduction && shouldUseSourceMap,
+              }),
+              // Don't consider CSS imports dead code even if the
+              // containing package claims to have no side effects.
+              // Remove this when webpack adds a warning or an error for this.
+              // See https://github.com/webpack/webpack/issues/6571
+              sideEffects: true,
+            },
+            // Adds support for CSS Modules (https://github.com/css-modules/css-modules)
+            // using the extension .module.css
+            {
+              test: cssModuleRegex,
+              use: getStyleLoaders({
+                importLoaders: 1,
+                sourceMap: isEnvProduction && shouldUseSourceMap,
+                modules: true,
+                getLocalIdent: getCSSModuleLocalIdent,
+              }),
+            },
+            // Opt-in support for SASS (using .scss or .sass extensions).
+            // By default we support SASS Modules with the
+            // extensions .module.scss or .module.sass
+            {
+              test: sassRegex,
+              exclude: sassModuleRegex,
+              use: getStyleLoaders(
+                {
+                  importLoaders: 2,
+                  sourceMap: isEnvProduction && shouldUseSourceMap,
+                },
+                'sass-loader'
+              ),
+              // Don't consider CSS imports dead code even if the
+              // containing package claims to have no side effects.
+              // Remove this when webpack adds a warning or an error for this.
+              // See https://github.com/webpack/webpack/issues/6571
+              sideEffects: true,
+            },
+            // Adds support for CSS Modules, but using SASS
+            // using the extension .module.scss or .module.sass
+            {
+              test: sassModuleRegex,
+              use: getStyleLoaders(
+                {
+                  importLoaders: 2,
+                  sourceMap: isEnvProduction && shouldUseSourceMap,
+                  modules: true,
+                  getLocalIdent: getCSSModuleLocalIdent,
+                },
+                'sass-loader'
+              ),
+            },
+            // The GraphQL loader preprocesses GraphQL queries in .graphql files.
+            {
+              test: /\.(graphql)$/,
+              loader: 'graphql-tag/loader',
+            },
+            // "file" loader makes sure those assets get served by WebpackDevServer.
+            // When you `import` an asset, you get its (virtual) filename.
+            // In production, they would get copied to the `build` folder.
+            // This loader doesn't use a "test" so it will catch all modules
+            // that fall through the other loaders.
+            {
+              loader: require.resolve('file-loader'),
+              // Exclude `js` files to keep "css" loader working as it injects
+              // its runtime that would otherwise be processed through "file" loader.
+              // Also exclude `html` and `json` extensions so they get processed
+              // by webpacks internal loaders.
+              exclude: [/\.(js|mjs|jsx|ts|tsx)$/, /\.html$/, /\.json$/],
+              options: {
+                name: 'static/media/[name].[hash:8].[ext]',
+              },
+            },
+            // ** STOP ** Are you adding a new loader?
+            // Make sure to add the new loader(s) before the "file" loader.
+          ],
+        },
+      ],
+    },
+    plugins: [
+      // Generates an `index.html` file with the <script> injected.
+      new HtmlWebpackPlugin(
+        Object.assign(
+          {},
+          {
+            inject: true,
+            template: paths.appHtml,
+          },
+          isEnvProduction
+            ? {
+                minify: {
+                  removeComments: true,
+                  collapseWhitespace: true,
+                  removeRedundantAttributes: true,
+                  useShortDoctype: true,
+                  removeEmptyAttributes: true,
+                  removeStyleLinkTypeAttributes: true,
+                  keepClosingSlash: true,
+                  minifyJS: true,
+                  minifyCSS: true,
+                  minifyURLs: true,
+                },
+              }
+            : undefined
+        )
+      ),
+      // Inlines the webpack runtime script. This script is too small to warrant
+      // a network request.
+      isEnvProduction &&
+        shouldInlineRuntimeChunk &&
+        new InlineChunkHtmlPlugin(HtmlWebpackPlugin, [/runtime~.+[.]js/]),
+      // Makes some environment variables available in index.html.
+      // The public URL is available as %PUBLIC_URL% in index.html, e.g.:
+      // <link rel="shortcut icon" href="%PUBLIC_URL%/favicon.ico">
+      // In production, it will be an empty string unless you specify "homepage"
+      // in `package.json`, in which case it will be the pathname of that URL.
+      // In development, this will be an empty string.
+      new InterpolateHtmlPlugin(HtmlWebpackPlugin, env.raw),
+      // This gives some necessary context to module not found errors, such as
+      // the requesting resource.
+      new ModuleNotFoundPlugin(paths.appPath),
+      // Makes some environment variables available to the JS code, for example:
+      // if (process.env.NODE_ENV === 'production') { ... }. See `./env.js`.
+      // It is absolutely essential that NODE_ENV is set to production
+      // during a production build.
+      // Otherwise React will be compiled in the very slow development mode.
+      new webpack.DefinePlugin(env.stringified),
+      // This is necessary to emit hot updates (currently CSS only):
+      isEnvDevelopment && new webpack.HotModuleReplacementPlugin(),
+      // Watcher doesn't work well if you mistype casing in a path so we use
+      // a plugin that prints an error when you attempt to do this.
+      // See https://github.com/facebook/create-react-app/issues/240
+      isEnvDevelopment && new CaseSensitivePathsPlugin(),
+      // If you require a missing module and then `npm install` it, you still have
+      // to restart the development server for Webpack to discover it. This plugin
+      // makes the discovery automatic so you don't have to restart.
+      // See https://github.com/facebook/create-react-app/issues/186
+      isEnvDevelopment &&
+        new WatchMissingNodeModulesPlugin(paths.appNodeModules),
+      isEnvProduction &&
+        new MiniCssExtractPlugin({
+          // Options similar to the same options in webpackOptions.output
+          // both options are optional
+          filename: 'static/css/[name].[contenthash:8].css',
+          chunkFilename: 'static/css/[name].[contenthash:8].chunk.css',
+        }),
+      // Generate a manifest file which contains a mapping of all asset filenames
+      // to their corresponding output file so that tools can pick it up without
+      // having to parse `index.html`.
+      new ManifestPlugin({
+        fileName: 'asset-manifest.json',
+        publicPath: publicPath,
+      }),
+      // Moment.js is an extremely popular library that bundles large locale files
+      // by default due to how Webpack interprets its code. This is a practical
+      // solution that requires the user to opt into importing specific locales.
+      // https://github.com/jmblog/how-to-optimize-momentjs-with-webpack
+      // You can remove this if you don't use Moment.js:
+      new webpack.IgnorePlugin(/^\.\/locale$/, /moment$/),
+      // TypeScript type checking
+      useTypeScript &&
+        new ForkTsCheckerWebpackPlugin({
+          typescript: resolve.sync('typescript', {
+            basedir: paths.appNodeModules,
+          }),
+          async: false,
+          checkSyntacticErrors: true,
+          tsconfig: paths.appTsConfig,
+          compilerOptions: {
+            module: 'esnext',
+            moduleResolution: 'node',
+            resolveJsonModule: true,
+            isolatedModules: true,
+            noEmit: true,
+            jsx: 'preserve',
+          },
+          reportFiles: [
+            '**',
+            '!**/*.json',
+            '!**/__tests__/**',
+            '!**/?(*.)(spec|test).*',
+            '!src/setupProxy.js',
+            '!src/setupTests.*',
+          ],
+          watch: paths.appSrc,
+          silent: true,
+          formatter: typescriptFormatter,
+        }),
+    ].filter(Boolean),
+    // Some libraries import Node modules but don't use them in the browser.
+    // Tell Webpack to provide empty mocks for them so importing them works.
+    node: {
+      dgram: 'empty',
+      fs: 'empty',
+      net: 'empty',
+      tls: 'empty',
+      child_process: 'empty',
+    },
+    // Turn off performance processing because we utilize
+    // our own hints via the FileSizeReporter
+    performance: false,
+  };
+};
diff --git a/packages/react-scripts/config/webpack.config.prod.js b/packages/react-scripts/config/webpack.config.prod.js
deleted file mode 100644
index df7f63856..000000000
--- a/packages/react-scripts/config/webpack.config.prod.js
+++ /dev/null
@@ -1,527 +0,0 @@
-// @remove-on-eject-begin
-/**
- * Copyright (c) 2015-present, Facebook, Inc.
- *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
- */
-// @remove-on-eject-end
-'use strict';
-
-const fs = require('fs');
-const path = require('path');
-const webpack = require('webpack');
-const resolve = require('resolve');
-const PnpWebpackPlugin = require('pnp-webpack-plugin');
-const HtmlWebpackPlugin = require('html-webpack-plugin');
-const InlineChunkHtmlPlugin = require('react-dev-utils/InlineChunkHtmlPlugin');
-const TerserPlugin = require('terser-webpack-plugin');
-const MiniCssExtractPlugin = require('mini-css-extract-plugin');
-const OptimizeCSSAssetsPlugin = require('optimize-css-assets-webpack-plugin');
-const safePostCssParser = require('postcss-safe-parser');
-const ManifestPlugin = require('webpack-manifest-plugin');
-const InterpolateHtmlPlugin = require('react-dev-utils/InterpolateHtmlPlugin');
-const ModuleScopePlugin = require('react-dev-utils/ModuleScopePlugin');
-const getCSSModuleLocalIdent = require('react-dev-utils/getCSSModuleLocalIdent');
-const paths = require('./paths');
-const getClientEnvironment = require('./env');
-const ModuleNotFoundPlugin = require('react-dev-utils/ModuleNotFoundPlugin');
-const ForkTsCheckerWebpackPlugin = require('fork-ts-checker-webpack-plugin-alt');
-const typescriptFormatter = require('react-dev-utils/typescriptFormatter');
-// @remove-on-eject-begin
-const getCacheIdentifier = require('react-dev-utils/getCacheIdentifier');
-// @remove-on-eject-end
-
-// Webpack uses `publicPath` to determine where the app is being served from.
-// It requires a trailing slash, or the file assets will get an incorrect path.
-const publicPath = paths.servedPath;
-// Some apps do not use client-side routing with pushState.
-// For these, "homepage" can be set to "." to enable relative asset paths.
-const shouldUseRelativeAssetPaths = publicPath === './';
-// Source maps are resource heavy and can cause out of memory issue for large source files.
-const shouldUseSourceMap = process.env.GENERATE_SOURCEMAP !== 'false';
-// Some apps do not need the benefits of saving a web request, so not inlining the chunk
-// makes for a smoother build process.
-const shouldInlineRuntimeChunk = process.env.INLINE_RUNTIME_CHUNK !== 'false';
-// `publicUrl` is just like `publicPath`, but we will provide it to our app
-// as %PUBLIC_URL% in `index.html` and `process.env.PUBLIC_URL` in JavaScript.
-// Omit trailing slash as %PUBLIC_URL%/xyz looks better than %PUBLIC_URL%xyz.
-const publicUrl = publicPath.slice(0, -1);
-// Get environment variables to inject into our app.
-const env = getClientEnvironment(publicUrl);
-
-// Assert this just to be safe.
-// Development builds of React are slow and not intended for production.
-if (env.stringified['process.env'].NODE_ENV !== '"production"') {
-  throw new Error('Production builds must have NODE_ENV=production.');
-}
-
-// Check if TypeScript is setup
-const useTypeScript = fs.existsSync(paths.appTsConfig);
-
-// style files regexes
-const cssRegex = /\.css$/;
-const cssModuleRegex = /\.module\.css$/;
-const sassRegex = /\.(scss|sass)$/;
-const sassModuleRegex = /\.module\.(scss|sass)$/;
-
-// common function to get style loaders
-const getStyleLoaders = (cssOptions, preProcessor) => {
-  const loaders = [
-    {
-      loader: MiniCssExtractPlugin.loader,
-      options: Object.assign(
-        {},
-        shouldUseRelativeAssetPaths ? { publicPath: '../../' } : undefined
-      ),
-    },
-    {
-      loader: require.resolve('css-loader'),
-      options: cssOptions,
-    },
-    {
-      // See postcss.config.js for options & plugins
-      loader: require.resolve('postcss-loader'),
-      options: {
-        sourceMap: shouldUseSourceMap,
-      },
-    },
-  ];
-  if (preProcessor) {
-    loaders.push({
-      loader: require.resolve(preProcessor),
-      options: {
-        sourceMap: shouldUseSourceMap,
-      },
-    });
-  }
-  return loaders;
-};
-
-// This is the production configuration.
-// It compiles slowly and is focused on producing a fast and minimal bundle.
-// The development configuration is different and lives in a separate file.
-module.exports = {
-  mode: 'production',
-  // Don't attempt to continue if there are any errors.
-  bail: true,
-  // We generate sourcemaps in production. This is slow but gives good results.
-  // You can exclude the *.map files from the build during deployment.
-  devtool: shouldUseSourceMap ? 'source-map' : false,
-  // In production, we only want to load the app code.
-  entry: [paths.appIndexJs],
-  output: {
-    // The build folder.
-    path: paths.appBuild,
-    // Generated JS file names (with nested folders).
-    // There will be one main bundle, and one file per asynchronous chunk.
-    // We don't currently advertise code splitting but Webpack supports it.
-    filename: 'static/js/[name].[chunkhash:8].js',
-    chunkFilename: 'static/js/[name].[chunkhash:8].chunk.js',
-    // We inferred the "public path" (such as / or /my-project) from homepage.
-    publicPath: publicPath,
-    // Point sourcemap entries to original disk location (format as URL on Windows)
-    devtoolModuleFilenameTemplate: info =>
-      path
-        .relative(paths.appSrc, info.absoluteResourcePath)
-        .replace(/\\/g, '/'),
-  },
-  optimization: {
-    minimizer: [
-      new TerserPlugin({
-        terserOptions: {
-          parse: {
-            // we want terser to parse ecma 8 code. However, we don't want it
-            // to apply any minfication steps that turns valid ecma 5 code
-            // into invalid ecma 5 code. This is why the 'compress' and 'output'
-            // sections only apply transformations that are ecma 5 safe
-            // https://github.com/facebook/create-react-app/pull/4234
-            ecma: 8,
-          },
-          compress: {
-            ecma: 5,
-            warnings: false,
-            // Disabled because of an issue with Uglify breaking seemingly valid code:
-            // https://github.com/facebook/create-react-app/issues/2376
-            // Pending further investigation:
-            // https://github.com/mishoo/UglifyJS2/issues/2011
-            comparisons: false,
-            // Disabled because of an issue with Terser breaking valid code:
-            // https://github.com/facebook/create-react-app/issues/5250
-            // Pending futher investigation:
-            // https://github.com/terser-js/terser/issues/120
-            inline: 2,
-          },
-          mangle: {
-            safari10: true,
-          },
-          output: {
-            ecma: 5,
-            comments: false,
-            // Turned on because emoji and regex is not minified properly using default
-            // https://github.com/facebook/create-react-app/issues/2488
-            ascii_only: true,
-          },
-        },
-        // Use multi-process parallel running to improve the build speed
-        // Default number of concurrent runs: os.cpus().length - 1
-        parallel: true,
-        // Enable file caching
-        cache: true,
-        sourceMap: shouldUseSourceMap,
-      }),
-      new OptimizeCSSAssetsPlugin({
-        cssProcessorOptions: {
-          parser: safePostCssParser,
-          map: shouldUseSourceMap
-            ? {
-                // `inline: false` forces the sourcemap to be output into a
-                // separate file
-                inline: false,
-                // `annotation: true` appends the sourceMappingURL to the end of
-                // the css file, helping the browser find the sourcemap
-                annotation: true,
-              }
-            : false,
-        },
-      }),
-    ],
-    // Automatically split vendor and commons
-    // https://twitter.com/wSokra/status/969633336732905474
-    // https://medium.com/webpack/webpack-4-code-splitting-chunk-graph-and-the-splitchunks-optimization-be739a861366
-    splitChunks: {
-      chunks: 'all',
-      name: false,
-    },
-    // Keep the runtime chunk seperated to enable long term caching
-    // https://twitter.com/wSokra/status/969679223278505985
-    runtimeChunk: true,
-  },
-  resolve: {
-    // This allows you to set a fallback for where Webpack should look for modules.
-    // We placed these paths second because we want `node_modules` to "win"
-    // if there are any conflicts. This matches Node resolution mechanism.
-    // https://github.com/facebook/create-react-app/issues/253
-    modules: ['node_modules'].concat(
-      // It is guaranteed to exist because we tweak it in `env.js`
-      process.env.NODE_PATH.split(path.delimiter).filter(Boolean)
-    ),
-    // These are the reasonable defaults supported by the Node ecosystem.
-    // We also include JSX as a common component filename extension to support
-    // some tools, although we do not recommend using it, see:
-    // https://github.com/facebook/create-react-app/issues/290
-    // `web` extension prefixes have been added for better support
-    // for React Native Web.
-    extensions: paths.moduleFileExtensions
-      .map(ext => `.${ext}`)
-      .filter(ext => useTypeScript || !ext.includes('ts')),
-    alias: {
-      // Support React Native Web
-      // https://www.smashingmagazine.com/2016/08/a-glimpse-into-the-future-with-react-native-for-web/
-      'react-native': 'react-native-web',
-    },
-    plugins: [
-      // Adds support for installing with Plug'n'Play, leading to faster installs and adding
-      // guards against forgotten dependencies and such.
-      PnpWebpackPlugin,
-      // Prevents users from importing files from outside of src/ (or node_modules/).
-      // This often causes confusion because we only process files within src/ with babel.
-      // To fix this, we prevent you from importing files out of src/ -- if you'd like to,
-      // please link the files into your node_modules/ and let module-resolution kick in.
-      // Make sure your source files are compiled, as they will not be processed in any way.
-      new ModuleScopePlugin(paths.appSrc, [paths.appPackageJson]),
-    ],
-  },
-  resolveLoader: {
-    plugins: [
-      // Also related to Plug'n'Play, but this time it tells Webpack to load its loaders
-      // from the current package.
-      PnpWebpackPlugin.moduleLoader(module),
-    ],
-  },
-  module: {
-    strictExportPresence: true,
-    rules: [
-      // Disable require.ensure as it's not a standard language feature.
-      { parser: { requireEnsure: false } },
-
-      // First, run the linter.
-      // It's important to do this before Babel processes the JS.
-      {
-        test: /\.(js|mjs|jsx)$/,
-        enforce: 'pre',
-        use: [
-          {
-            options: {
-              formatter: require.resolve('react-dev-utils/eslintFormatter'),
-              eslintPath: require.resolve('eslint'),
-            },
-            loader: require.resolve('eslint-loader'),
-          },
-        ],
-        include: paths.appSrc,
-      },
-      {
-        // "oneOf" will traverse all following loaders until one will
-        // match the requirements. When no loader matches it will fall
-        // back to the "file" loader at the end of the loader list.
-        oneOf: [
-          // "url" loader works just like "file" loader but it also embeds
-          // assets smaller than specified size as data URLs to avoid requests.
-          {
-            test: [/\.bmp$/, /\.gif$/, /\.jpe?g$/, /\.png$/],
-            loader: require.resolve('url-loader'),
-            options: {
-              limit: 10000,
-              name: 'static/media/[name].[hash:8].[ext]',
-            },
-          },
-          // Process application JS with Babel.
-          // The preset includes JSX, Flow, TypeScript and some ESnext features.
-          {
-            test: /\.(js|mjs|jsx|ts|tsx)$/,
-            include: paths.appSrc,
-            loader: require.resolve('babel-loader'),
-            options: {
-              customize: require.resolve(
-                'babel-preset-react-app/webpack-overrides'
-              ),
-              // @remove-on-eject-begin
-              // Make sure we have a unique cache identifier, erring on the
-              // side of caution.
-              // We remove this when the user ejects because the default
-              // is sane and uses Babel options. Instead of options, we use
-              // the react-scripts and babel-preset-react-app versions.
-              cacheIdentifier: getCacheIdentifier('production', [
-                'babel-preset-react-app',
-                'react-dev-utils',
-                'react-scripts',
-              ]),
-              // @remove-on-eject-end
-              cacheDirectory: true,
-              // Save disk space when time isn't as important
-              cacheCompression: true,
-              compact: true,
-            },
-          },
-          // Process any JS outside of the app with Babel.
-          // Unlike the application JS, we only compile the standard ES features.
-          {
-            test: /\.(js|mjs)$/,
-            exclude: /@babel(?:\/|\\{1,2})runtime/,
-            loader: require.resolve('babel-loader'),
-            options: {
-              babelrc: false,
-              configFile: false,
-              compact: false,
-              presets: [
-                [
-                  require.resolve('babel-preset-react-app/dependencies'),
-                  { helpers: true },
-                ],
-              ],
-              cacheDirectory: true,
-              // Save disk space when time isn't as important
-              cacheCompression: true,
-              // @remove-on-eject-begin
-              cacheIdentifier: getCacheIdentifier('production', [
-                'babel-preset-react-app',
-                'react-dev-utils',
-                'react-scripts',
-              ]),
-              // @remove-on-eject-end
-              // If an error happens in a package, it's possible to be
-              // because it was compiled. Thus, we don't want the browser
-              // debugger to show the original code. Instead, the code
-              // being evaluated would be much more helpful.
-              sourceMaps: false,
-            },
-          },
-          // "postcss" loader applies autoprefixer to our CSS.
-          // "css" loader resolves paths in CSS and adds assets as dependencies.
-          // `MiniCSSExtractPlugin` extracts styles into CSS
-          // files. If you use code splitting, async bundles will have their own separate CSS chunk file.
-          // By default we support CSS Modules with the extension .module.css
-          {
-            test: cssRegex,
-            exclude: cssModuleRegex,
-            loader: getStyleLoaders({
-              importLoaders: 1,
-              sourceMap: shouldUseSourceMap,
-            }),
-            // Don't consider CSS imports dead code even if the
-            // containing package claims to have no side effects.
-            // Remove this when webpack adds a warning or an error for this.
-            // See https://github.com/webpack/webpack/issues/6571
-            sideEffects: true,
-          },
-          // Adds support for CSS Modules (https://github.com/css-modules/css-modules)
-          // using the extension .module.css
-          {
-            test: cssModuleRegex,
-            loader: getStyleLoaders({
-              importLoaders: 1,
-              sourceMap: shouldUseSourceMap,
-              modules: true,
-              getLocalIdent: getCSSModuleLocalIdent,
-            }),
-          },
-          // Opt-in support for SASS. The logic here is somewhat similar
-          // as in the CSS routine, except that "sass-loader" runs first
-          // to compile SASS files into CSS.
-          // By default we support SASS Modules with the
-          // extensions .module.scss or .module.sass
-          {
-            test: sassRegex,
-            exclude: sassModuleRegex,
-            loader: getStyleLoaders(
-              {
-                importLoaders: 2,
-                sourceMap: shouldUseSourceMap,
-              },
-              'sass-loader'
-            ),
-            // Don't consider CSS imports dead code even if the
-            // containing package claims to have no side effects.
-            // Remove this when webpack adds a warning or an error for this.
-            // See https://github.com/webpack/webpack/issues/6571
-            sideEffects: true,
-          },
-          // Adds support for CSS Modules, but using SASS
-          // using the extension .module.scss or .module.sass
-          {
-            test: sassModuleRegex,
-            loader: getStyleLoaders(
-              {
-                importLoaders: 2,
-                sourceMap: shouldUseSourceMap,
-                modules: true,
-                getLocalIdent: getCSSModuleLocalIdent,
-              },
-              'sass-loader'
-            ),
-          },
-          // The GraphQL loader preprocesses GraphQL queries in .graphql files.
-          {
-            test: /\.(graphql)$/,
-            loader: 'graphql-tag/loader',
-          },
-          // "file" loader makes sure assets end up in the `build` folder.
-          // When you `import` an asset, you get its filename.
-          // This loader doesn't use a "test" so it will catch all modules
-          // that fall through the other loaders.
-          {
-            loader: require.resolve('file-loader'),
-            // Exclude `js` files to keep "css" loader working as it injects
-            // it's runtime that would otherwise be processed through "file" loader.
-            // Also exclude `html` and `json` extensions so they get processed
-            // by webpacks internal loaders.
-            exclude: [/\.(js|mjs|jsx|ts|tsx)$/, /\.html$/, /\.json$/],
-            options: {
-              name: 'static/media/[name].[hash:8].[ext]',
-            },
-          },
-          // ** STOP ** Are you adding a new loader?
-          // Make sure to add the new loader(s) before the "file" loader.
-        ],
-      },
-    ],
-  },
-  plugins: [
-    // Generates an `index.html` file with the <script> injected.
-    new HtmlWebpackPlugin({
-      inject: true,
-      template: paths.appHtml,
-      minify: {
-        removeComments: true,
-        collapseWhitespace: true,
-        removeRedundantAttributes: true,
-        useShortDoctype: true,
-        removeEmptyAttributes: true,
-        removeStyleLinkTypeAttributes: true,
-        keepClosingSlash: true,
-        minifyJS: true,
-        minifyCSS: true,
-        minifyURLs: true,
-      },
-    }),
-    // Inlines the webpack runtime script. This script is too small to warrant
-    // a network request.
-    shouldInlineRuntimeChunk &&
-      new InlineChunkHtmlPlugin(HtmlWebpackPlugin, [/runtime~.+[.]js/]),
-    // Makes some environment variables available in index.html.
-    // The public URL is available as %PUBLIC_URL% in index.html, e.g.:
-    // <link rel="shortcut icon" href="%PUBLIC_URL%/favicon.ico">
-    // In production, it will be an empty string unless you specify "homepage"
-    // in `package.json`, in which case it will be the pathname of that URL.
-    new InterpolateHtmlPlugin(HtmlWebpackPlugin, env.raw),
-    // This gives some necessary context to module not found errors, such as
-    // the requesting resource.
-    new ModuleNotFoundPlugin(paths.appPath),
-    // Makes some environment variables available to the JS code, for example:
-    // if (process.env.NODE_ENV === 'production') { ... }. See `./env.js`.
-    // It is absolutely essential that NODE_ENV was set to production here.
-    // Otherwise React will be compiled in the very slow development mode.
-    new webpack.DefinePlugin(env.stringified),
-    new MiniCssExtractPlugin({
-      // Options similar to the same options in webpackOptions.output
-      // both options are optional
-      filename: 'static/css/[name].[contenthash:8].css',
-      chunkFilename: 'static/css/[name].[contenthash:8].chunk.css',
-    }),
-    // Generate a manifest file which contains a mapping of all asset filenames
-    // to their corresponding output file so that tools can pick it up without
-    // having to parse `index.html`.
-    new ManifestPlugin({
-      fileName: 'asset-manifest.json',
-      publicPath: publicPath,
-    }),
-    // Moment.js is an extremely popular library that bundles large locale files
-    // by default due to how Webpack interprets its code. This is a practical
-    // solution that requires the user to opt into importing specific locales.
-    // https://github.com/jmblog/how-to-optimize-momentjs-with-webpack
-    // You can remove this if you don't use Moment.js:
-    new webpack.IgnorePlugin(/^\.\/locale$/, /moment$/),
-    // TypeScript type checking
-    fs.existsSync(paths.appTsConfig) &&
-      new ForkTsCheckerWebpackPlugin({
-        typescript: resolve.sync('typescript', {
-          basedir: paths.appNodeModules,
-        }),
-        async: false,
-        checkSyntacticErrors: true,
-        tsconfig: paths.appTsConfig,
-        compilerOptions: {
-          module: 'esnext',
-          moduleResolution: 'node',
-          resolveJsonModule: true,
-          isolatedModules: true,
-          noEmit: true,
-          jsx: 'preserve',
-        },
-        reportFiles: [
-          '**',
-          '!**/*.json',
-          '!**/__tests__/**',
-          '!**/?(*.)(spec|test).*',
-          '!src/setupProxy.js',
-          '!src/setupTests.*',
-        ],
-        watch: paths.appSrc,
-        silent: true,
-        formatter: typescriptFormatter,
-      }),
-  ].filter(Boolean),
-  // Some libraries import Node modules but don't use them in the browser.
-  // Tell Webpack to provide empty mocks for them so importing them works.
-  node: {
-    dgram: 'empty',
-    fs: 'empty',
-    net: 'empty',
-    tls: 'empty',
-    child_process: 'empty',
-  },
-  // Turn off performance processing because we utilize
-  // our own hints via the FileSizeReporter
-  performance: false,
-};
diff --git a/packages/react-scripts/config/webpackDevServer.config.js b/packages/react-scripts/config/webpackDevServer.config.js
index 3ff6ad6b4..60a9713df 100644
--- a/packages/react-scripts/config/webpackDevServer.config.js
+++ b/packages/react-scripts/config/webpackDevServer.config.js
@@ -12,7 +12,6 @@ const errorOverlayMiddleware = require('react-dev-utils/errorOverlayMiddleware')
 const evalSourceMapMiddleware = require('react-dev-utils/evalSourceMapMiddleware');
 const noopServiceWorkerMiddleware = require('react-dev-utils/noopServiceWorkerMiddleware');
 const ignoredFiles = require('react-dev-utils/ignoredFiles');
-const config = require('./webpack.config.dev');
 const paths = require('./paths');
 const fs = require('fs');
 
@@ -69,7 +68,7 @@ module.exports = function(proxy, allowedHost) {
     hot: true,
     // It is important to tell WebpackDevServer to use the same "root" path
     // as we specified in the config. In development, we always serve from /.
-    publicPath: config.output.publicPath,
+    publicPath: '/',
     // WebpackDevServer is noisy by default so we emit custom message instead
     // by listening to the compiler events with `compiler.hooks[...].tap` calls above.
     quiet: true,
diff --git a/packages/react-scripts/scripts/build.js b/packages/react-scripts/scripts/build.js
index ccf35fc92..35cbfc150 100644
--- a/packages/react-scripts/scripts/build.js
+++ b/packages/react-scripts/scripts/build.js
@@ -36,7 +36,7 @@ const chalk = require('chalk');
 const fs = require('fs-extra');
 const webpack = require('webpack');
 const bfj = require('bfj');
-const config = require('../config/webpack.config.prod');
+const configFactory = require('../config/webpack.config');
 const paths = require('../config/paths');
 const checkRequiredFiles = require('react-dev-utils/checkRequiredFiles');
 const formatWebpackMessages = require('react-dev-utils/formatWebpackMessages');
@@ -64,6 +64,9 @@ if (!checkRequiredFiles([paths.appHtml, paths.appIndexJs])) {
 const argv = process.argv.slice(2);
 const writeStatsJson = argv.indexOf('--stats') !== -1;
 
+// Generate configuration
+const config = configFactory('production');
+
 // We require that you explicitly set browsers and do not fall back to
 // browserslist defaults.
 const { checkBrowsers } = require('react-dev-utils/browsersHelper');
diff --git a/packages/react-scripts/scripts/start.js b/packages/react-scripts/scripts/start.js
index f48e12d37..7750c25a1 100644
--- a/packages/react-scripts/scripts/start.js
+++ b/packages/react-scripts/scripts/start.js
@@ -45,7 +45,7 @@ const {
 } = require('react-dev-utils/WebpackDevServerUtils');
 const openBrowser = require('react-dev-utils/openBrowser');
 const paths = require('../config/paths');
-const config = require('../config/webpack.config.dev');
+const configFactory = require('../config/webpack.config');
 const createDevServerConfig = require('../config/webpackDevServer.config');
 
 const useYarn = fs.existsSync(paths.yarnLockFile);
@@ -91,6 +91,7 @@ checkBrowsers(paths.appPath, isInteractive)
       // We have not found a port.
       return;
     }
+    const config = configFactory('development');
     const protocol = process.env.HTTPS === 'true' ? 'https' : 'http';
     const appName = require(paths.appPackageJson).name;
     const urls = prepareUrls(protocol, HOST, port);