Yes. If your node app is working off of port 3000 like in your example then just use ngrok to create a reverse proxy to expose 3000 to the world. Websockets will work just fine with it.
Yes. If your node app is working off of port 3000 like in your example then just use ngrok to create a reverse proxy to expose 3000 to the world. Websockets will work just fine with it.