initial setup boilerplate

.eslintignore

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+# don't ever lint node_modules
+node_modules
+node_modules/*
+
+# don't lint build output (make sure it's set to your correct build folder name)
+build
+
+# don't lint nyc coverage output
+coverage
+src/serviceWorker.ts

.eslintrc.js

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+module.exports = {
+  env: {
+    browser: true,
+    es2021: true,
+    node: true,
+  },
+  extends: [
+    'eslint:recommended',
+    'plugin:react/recommended',
+    'plugin:@typescript-eslint/recommended',
+    'plugin:jsx-a11y/recommended',
+  ],
+  parser: '@typescript-eslint/parser',
+  parserOptions: {
+    ecmaFeatures: {
+      jsx: true,
+    },
+    ecmaVersion: 'latest',
+    sourceType: 'module',
+  },
+  plugins: ['react', '@typescript-eslint', 'jsx-a11y'],
+  rules: {
+    '@typescript-eslint/no-explicit-any': 'off',
+    '@typescript-eslint/no-empty-function': 'off',
+    '@typescript-eslint/ban-ts-comment': 'off',
+    '@typescript-eslint/no-non-null-assertion': 'off', // !
+    '@typescript-eslint/no-extra-non-null-assertion': 'off', // !!
+    '@typescript-eslint/explicit-module-boundary-types': 'error',
+    'no-async-promise-executor': 'off',
+    'no-extra-boolean-cast': 'off',
+  },
+  settings: {
+    react: {
+      version: 'detect',
+    },
+  },
+};

.husky/pre-commit

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+#!/usr/bin/env sh
+. "$(dirname -- "$0")/_/husky.sh"
+
+npx lint-staged && npm run lint && npm run test -- --watchAll=false --passWithNoTests

.prettierignore

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+build
+coverage

.prettierrc

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+{
+  "printWidth": 80,
+  "singleQuote": true,
+  "trailingComma": "all"
+}