Any suggestions for the same nice simple code but working with newer ws and express?

I have it working with "express": "4.14.0", and "ws": "0.4.32" but the present express is 4.15.0 and the present ws is 2.2.2.

Any idea why it does not work with the new package versions?

I wanted to test heroku's websocket support and tried to follow the steps in this article:
https://devcenter.heroku.com/articles/node-websockets

However, when I tried the first command:
$ git clone https://github.com/heroku-examples/node-ws-test.git

instead of having a clone of this app, a warning was shown saying:
Cloning into node-ws-test...
warning: remote HEAD refers to nonexistent ref, unable to checkout.

Searching for the message, I found this SO Q&A:
http://stackoverflow.com/q/1961274/66580

But it appears only the owner of the repo could do what is suggested by the answer.

I have just copied pasted your code because i'm desperate. But still same error:
test.html:6 WebSocket connection to 'ws://xamchat.herokuapp.com/' failed: