Added eslint, lint code

Author: maitraysuthar

.eslintrc.json

@@ -0,0 +1,34 @@
+{
+    "env": {
+        "commonjs": true,
+        "es6": true,
+        "node": true,
+        "mocha": true
+    },
+    "extends": "eslint:recommended",
+    "globals": {
+        "Atomics": "readonly",
+        "SharedArrayBuffer": "readonly"
+    },
+    "parserOptions": {
+        "ecmaVersion": 2018
+    },
+    "rules": {
+        "indent": [
+            "error",
+            "tab"
+        ],
+        "linebreak-style": [
+            "error",
+            "unix"
+        ],
+        "quotes": [
+            "error",
+            "double"
+        ],
+        "semi": [
+            "error",
+            "always"
+        ]
+    }
+}

app.js

@@ -1,57 +1,57 @@
-var express = require('express');
-var path = require('path');
-var cookieParser = require('cookie-parser');
-var logger = require('morgan');
-require('dotenv').config()
-var indexRouter = require('./routes/index');
-var apiRouter = require('./routes/api');
-var apiResponse = require('./helpers/apiResponse');
-var cors = require('cors');
+var express = require("express");
+var path = require("path");
+var cookieParser = require("cookie-parser");
+var logger = require("morgan");
+require("dotenv").config();
+var indexRouter = require("./routes/index");
+var apiRouter = require("./routes/api");
+var apiResponse = require("./helpers/apiResponse");
+var cors = require("cors");
 
 // DB connection
 var MONGODB_URL = process.env.MONGODB_URL;
-var mongoose = require('mongoose');
+var mongoose = require("mongoose");
 mongoose.connect(MONGODB_URL, { useNewUrlParser: true }).then(() => {
-    //don't show the log when it is test
-    if(process.env.NODE_ENV !== 'test') {
-        console.log("Connected to %s", MONGODB_URL);
-        console.log("App is running ... \n");
-        console.log("Press CTRL + C to stop the process. \n");
-    }
-  })
-  .catch(err => {
-    console.error("App starting error:", err.message);
-    process.exit(1);
-  });
+	//don't show the log when it is test
+	if(process.env.NODE_ENV !== "test") {
+		console.log("Connected to %s", MONGODB_URL);
+		console.log("App is running ... \n");
+		console.log("Press CTRL + C to stop the process. \n");
+	}
+})
+	.catch(err => {
+		console.error("App starting error:", err.message);
+		process.exit(1);
+	});
 var db = mongoose.connection;
 
 var app = express();
 
 //don't show the log when it is test
-if(process.env.NODE_ENV !== 'test') {
-  app.use(logger('dev'));
+if(process.env.NODE_ENV !== "test") {
+	app.use(logger("dev"));
 }
 app.use(express.json());
 app.use(express.urlencoded({ extended: false }));
 app.use(cookieParser());
-app.use(express.static(path.join(__dirname, 'public')));
+app.use(express.static(path.join(__dirname, "public")));
 
 //To allow cross-origin requests
 app.use(cors());
 
 //Route Prefixes
-app.use('/', indexRouter);
-app.use('/api/', apiRouter);
+app.use("/", indexRouter);
+app.use("/api/", apiRouter);
 
 // throw 404 if URL not found
 app.all("*", function(req, res) {
-    return apiResponse.notFoundResponse(res, 'Page not found');
+	return apiResponse.notFoundResponse(res, "Page not found");
 });
 
-app.use((err, req, res, next) => {
-  if(err.name == "UnauthorizedError"){
-    return apiResponse.unauthorizedResponse(res, err.message);
-  }
+app.use((err, req, res) => {
+	if(err.name == "UnauthorizedError"){
+		return apiResponse.unauthorizedResponse(res, err.message);
+	}
 });
 
 module.exports = app;