[J] 1주차 PR1

.eslintrc.json

@@ -0,0 +1,18 @@
+{
+  "parserOptions": {
+    "ecmaFeatures": {
+      "jsx": true
+    },
+    "ecmaVersion": 6,
+    "sourceType": "module"
+  },
+  "extends": ["react-app", "prettier"],
+  "rules": {
+    "no-multiple-empty-lines": "warn",
+    "no-console": "warn",
+    "no-unused-vars": "warn",
+    "react/no-unused-state": "warn",
+    "react/no-direct-mutation-state": "warn",
+    "react/jsx-curly-brace-presence": "warn"
+}
+}

.gitignore

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+# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
+
+# dependencies
+/node_modules
+/.pnp
+.pnp.js
+
+# testing
+/coverage
+
+# production
+/build
+
+# misc
+.DS_Store
+.env.local
+.env.development.local
+.env.test.local
+.env.production.local
+
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*

.prettierrc

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+{
+  "trailingComma": "all",
+  "tabWidth": 2,
+  "semi": true,
+  "singleQuote": true
+}