server.js

// config.js
const merge = require('lodash').merge;

const config = {
    // Common configuration section
    sentry: {
        url: 'https://',
    },
    mongodbUri: 'mongodb://',
    url: global.hasOwnProperty('location') ? global.location.origin + '/' : '',
    port: process.env.PORT || 80,
};

module.exports = config;

// http.js
import { createServer } from 'http';

import app from './app';
import runSocket from './socket';

import config from '../../../config';

const server = createServer(app);

runSocket(server);

server.listen(config.port, () => {
  console.log(`HTTP server started ${config.port} port!`);
});

export default server;