Please see the documentation here.
The source code of the website can be found here. Contributions are welcome!
Debug / logging
In order to see all the client debug output, run the following command on the browser console – including the desired scope – and reload your app page:
localStorage.debug = '*';
And then, filter by the scopes you're interested in. See also: https://socket.io/docs/v3/logging-and-debugging/