index.js

// Main starting point of application
const express = require('express');
const http = require('http'); // native node library for working with http requests
const bodyParser = require('body-parser');
const morgan = require('morgan');
const app = express();
const router = require('./router');
const mongoose = require('mongoose');
const cors = require('cors');

// DB Setup
mongoose.connect('mongodb://localhost:auth/auth');

// App setup
app.use(morgan('combined'));
app.use(cors());
app.use(bodyParser.json({ type: "*/*" }));
router(app);

// Server setup
const port = process.env.PORT || 3090;
const server = http.createServer(app); // create an HTTP server that receives requests and forwards them to app
server.listen(port);
console.log("Server listening on port " + port);