Access nodejs app on koding.com

I'm trying to upload two node.js files to koding.com and run them.

index.js contains:

var server = require("./server");

server.start();

And server.js

var http = require("http");
var url = require("url");

function start() {
  function onRequest(request, response) {
    console.log("Request received.");
    response.writeHead(200, {"Content-Type": "text/plain"});
    response.write("Hello World");
    response.end();
  }

    http.createServer(onRequest).listen(6665, '0.0.0.0');
    console.log("Server has started.");
}

exports.start = start;

I typed in vm terminal jstq@vm-0:~$ node Web/IkapNodeJS/index.js it gives me Server has started. If im going to http://jstq.kd.io/IkapNodeJS/index.js - i see index.js contains. When im adding :6665 to that url - url not found.

How do i see page with hello world?