I posted previously about containerizing Squadrick’s clone of Typehere.co. There have been some fixes recently and I finally got around to uploading it to Dockerhub so it is about as easy to run as is physically possible.
docker run -p 8585:80 bradganley/typehere and then point your browser to localhost:8585
The way this work, not that I’m aware of. Your best bet for that would probably be etherpad