How do I receive push notifications with socket.IO-client?

My goal is to get push notifications from the web site (it provides socketIO interface). In order to do that I use socket.io-client library. I took the code from some socket.io examples. Here it is:

var io = require('socket.io-client');

socket = io.connect('https://cryptonit.net', {
    port: 8080
});

socket.on('connect', function() { 
    console.log('connected');
 });

socket.on('message', function(msg){
    console.log(msg);
});

socket.on('disconnect', function() {
    console.log('disconnected');
});

socket.on('error', function (e) {
    console.log('System', e ? e : 'A unknown error occurred');
});

But I don't get any messages, neither I see that connection was established. What can be the possible source of the problem? How can I test this code?

Actually all examples I've seen were supposed to connect to the localhost, not to the real website.