feat: use typescript

Author: nvh95

.eslintrc.js

@@ -0,0 +1,26 @@
+// .eslintrc
+module.exports = {
+  parser: '@typescript-eslint/parser',
+  ignorePatterns: ['.eslintrc.js'],
+  parserOptions: {
+    ecmaVersion: 12,
+    sourceType: 'module',
+  },
+  plugins: ['@typescript-eslint'],
+  extends: [
+    'eslint:recommended',
+    'plugin:@typescript-eslint/recommended',
+    'prettier',
+  ],
+
+  rules: {
+    '@typescript-eslint/no-unused-vars': 'error',
+    // to enforce using type for object type definitions, can be type or interface
+    '@typescript-eslint/consistent-type-definitions': ['error', 'type'],
+  },
+
+  env: {
+    browser: true,
+    es2021: true,
+  },
+};

.gitignore

@@ -7,4 +7,5 @@
 npm-debug.log*
 .DS_Store
 .netlify
-.npmrc
+.npmrc
+/build

.prettierrc.json

@@ -1 +1,6 @@
-{}
+{
+  "singleQuote": true,
+  "trailingComma": "all",
+  "bracketSpacing": true,
+  "tabWidth": 2
+}

.vscode/settings.json

@@ -1,4 +1,7 @@
 {
+  "editor.defaultFormatter": "esbenp.prettier-vscode",
   "editor.formatOnSave": true,
-  "files.insertFinalNewline": true
+  "files.insertFinalNewline": true,
+  "editor.formatOnPaste": false,
+  "cSpell.words": ["emailaddress"]
 }