server.js

'use strict';
/**
 * Module dependencies.
 */
var init = require('./config/init')(),
	config = require('./config/config'),
	mongoose = require('mongoose'),
    _ = require('lodash'),
	chalk = require('chalk');

// Dependencies for Cluster
var cluster = require('cluster');
var os = require('os');
var throng = require('throng');

/**
 * Main application entry file.
 * Please note that the order of loading is important.
 */

// Bootstrap db connection
var db = mongoose.connect(config.db, function(err) {
	if (err) {
		console.error(chalk.red('Could not connect to MongoDB!'));
		console.log(chalk.red(err));
	}
});

// Init the express application
var app = require('./config/express')(db);

// Bootstrap passport config
require('./config/passport')();

// // Start the app by listening on <port>
// app.listen(config.port);

// Start the app by listening on <port> after forking cluster

var cpus = os.cpus().length;
var workers = process.env.WEB_CONCURRENCY || cpus;

var start = function(){
    app.listen(config.port);
};

throng(start, {
    workers: workers,
    lifetime: Infinity
});

// Expose app
exports = module.exports = app;

// Logging initialization
console.log('Application started on port ' + config.port);