PHP - Problema con Socket.io - ERR_CONNECTION_TIMED_OUT

GET http://midominio.com:8080/socket.io/?EIO=2&transport=polling&t=1501447379143-1 net::ERR_CONNECTION_TIMED_OUT

var socket = io('http://midominio.com:8080');

var server = require('library/server.js');

var router = require('library/router.js');

var requestHandlers = require('library/requestHandlers.js');

var handle = {}

handle["/"] = requestHandlers.handleStaticFiles;

handle["static"] = requestHandlers.handleStaticFiles;

server.start(router.route, handle);

var http = require("http");

var url = require("url");

var port = process.env.OPENSHIFT_NODEJS_PORT || 8080;

var serverUrl = process.env.OPENSHIFT_NODEJS_IP || 'http://midominio.com';

console.log(" serverUrl : " + serverUrl + " Port : " + port);

var io = '';

var connectedUsers = 0;

var ongoingGames = 0;

var globalSocket = 0;