Love docker. Don't think you need to follow someone else's docker file for this. Just brainstorming here, but all you'd have to do is get a docker image that matches 1 of the supported OS's on
https://github.com/EQEmu/Server/wiki/Linux-Server . Then you would setup the docker file to run the eqemu install commands if you want to have a rebuildable eqemu docker image. However, you could just fire up an ubuntu instance, run the install commands manually and save the image as a .tar ball that you can later load. There will probably be some network ports to open up and some permission layers. You could go further by splitting off the db to its own mysql image, and using docker-compose to link it all up.