Set up linter for frontend part

.eslintignore

@@ -1 +1,2 @@
 node_modules/
+public/dist/

.gitignore

@@ -68,3 +68,4 @@ db/
 
 # Cache of babel and others
 .cache/
+.eslintcache

frontend/js/app.js

@@ -1,8 +1,12 @@
+// No inspection for unused var `css` because it's used for css bundle
+// eslint-disable-next-line no-unused-vars
 import css from '../styles/main.pcss';
 
 module.exports = class Docs {
-  constructor(){
+  /**
+   * @constructor
+   */
+  constructor() {
     console.log('CodeX Docs initialized');
-
   }
-}
+};

package.json

@@ -5,8 +5,9 @@
   "scripts": {
     "start": "nodemon ./bin/www",
     "test": "mocha --recursive ./test",
-    "lint": "eslint --fix ./**/*.js",
+    "lint": "eslint --fix --cache ./**/*.js",
-    "build": "webpack ./frontend/js/app.js --o='./public/dist/bundle.js' --output-library=Docs -d"
+    "build": "webpack ./frontend/js/app.js --o='./public/dist/bundle.js' --output-library=Docs -d",
+    "precommit": "yarn lint && yarn test --exit"
   },
   "dependencies": {
     "body-parser": "latest",

webpack.config.js

@@ -8,7 +8,7 @@ const babelLoader = {
   options: {
     cacheDirectory: '.cache/babel-loader',
     presets: [
-      "env"
+      'env'
     ],
     plugins: [
       /**