server.js

const express = require('express');
const bodyParser = require('body-parser');
const mongoose = require('mongoose');
const morgan = require('morgan');
const passport = require('passport');
const config = require('./config/main');
const router = require('./router');

const app = express();

mongoose.connect(config.database);

app.use(bodyParser.urlencoded({extended: true}));
app.use(bodyParser.json());
app.use(passport.initialize());
app.use(morgan('dev'));

// Enable CORS from client-side
app.use(function(req, res, next) {
  res.header("Access-Control-Allow-Origin", "*");
  res.header('Access-Control-Allow-Methods', 'PUT, GET, POST, DELETE, OPTIONS');
  res.header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept, Authorization, Access-Control-Allow-Credentials");
  res.header("Access-Control-Allow-Credentials", "true");
  res.header("Content-Type", "application/json");
  next();
});

router(app);

// Start server
const server = app.listen(config.port);
console.log('Your server is running on port ' + config.port + '.');