index.js

// FileName: index.js
// Import express
let express = require('express')
// Import routes
let apiRoutes = require("./api-routes")
// Import Body parser
let bodyParser = require('body-parser');
// Import Mongoose
let mongoose = require('mongoose');

// Initialize the app
let app = express();

// Setup server port
var port = process.env.PORT || 8081;

// Configure bodyparser to handle post requests
app.use(bodyParser.urlencoded({
    extended: true
 }));
 app.use(bodyParser.json());
 // Connect to Mongoose and set connection variable
// Deprecated: mongoose.connect('mongodb://localhost/resthub');
mongoose.connect('mongodb://localhost/resthub', { useNewUrlParser: true});
var db = mongoose.connection;
// Added check for DB connection
if(!db)
    console.log("Error connecting db")
else
    console.log("Db connected successfully")
    

// Send message for default URL
app.get('/', (req, res) => res.send('Hello World with Express'));
// Use Api routes in the App
app.use('/api', apiRoutes)

// Launch app to listen to specified port
app.listen(port, function () {
     console.log("Running RestHub on port " + port);
});