Set .prettierrc and .eslintrc.js

.eslintrc.js

@@ -0,0 +1,31 @@
+module.exports = {
+  env: {
+    browser: true,
+    es2021: true,
+  },
+  extends: ["eslint:recommended", "plugin:react/recommended", "prettier"],
+  overrides: [
+    {
+      env: {
+        node: true,
+      },
+      files: [".eslintrc.{js,cjs}"],
+      parserOptions: {
+        sourceType: "script",
+      },
+    },
+  ],
+  parserOptions: {
+    ecmaVersion: "latest",
+    sourceType: "module",
+  },
+  plugins: ["react", "prettier"],
+  rules: {
+    "prettier/prettier": "error",
+    "react/react-in-jsx-scope": "off",
+    "react/prop-types": "off",
+    "no-unused-vars": "off",
+    "no-useless-escape": "off",
+    "no-undef": "off",
+  },
+};

.prettierrc

@@ -0,0 +1,8 @@
+{
+  "singleQuote": true,
+  "semi": true,
+  "useTabs": false,
+  "tabWidth": 2,
+  "trailingComma": "all",
+  "printWidth": 80
+}