I will move the glitch link to the top and see what I can do about adding a nice screenshot. And about zulip, it's a better alternative to slack, irc or gitter. I will see how I can make it better.
About the docker file, I personally haven't used docker and I don't think the app requires an dependencies expect for node modules and the app is actually cross-platform and lightweight. So I would like to know what would be benefits of adding a docker-compost file.
Lastly, I want to know about how the install flow went If you tried it.