[ADD] Install eslint

Author: Carms Ng

.eslintrc.js

@@ -0,0 +1,33 @@
+module.exports = {
+  env: {
+    browser: true,
+    es2021: true,
+  },
+  extends: [
+    'plugin:react/recommended',
+    'airbnb',
+  ],
+  parserOptions: {
+    ecmaFeatures: {
+      jsx: true,
+    },
+    ecmaVersion: 12,
+    sourceType: 'module',
+  },
+  plugins: [
+    'react',
+  ],
+  rules: {
+    'react/jsx-filename-extension': [
+      1,
+      {
+        extensions: [
+          '.js',
+          '.jsx',
+        ],
+      },
+    ],
+    'no-param-reassign': 0,
+    'react/prop-types': 0,
+  },
+};