server.js for mean.js app with socket.io - problem

gistfile1.js

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

/**
 * 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('\x1b[31m', 'Could not connect to MongoDB!');
		console.log(err);
	}
});

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

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

// Start the app by listening on <port>
//var server = app.listen(config.port);
//var io = require('socket.io').listen(server);

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

// Logging initialization
console.log('MEAN.JS application started on port ' + config.port);

io.on('connection', function(socket){
    console.log('user connected');
    socket.emit('hello',{data:'test'});
    socket.on('test', function (data) {
        this.emit('test:received', {data: 'test'});
    })
    socket.on('disconnect', function(){
        console.log('user disconnected');
    });
});

http.listen(3000,function() {console.log('listening')});