Hey Slashie, sorry to be slow to respond. That link worked for me. Thanks for your help. I had to change base images and make other changes, but I got a container working for zeldarl. It is here: https://hub.docker.com/r/phaethonfire/zeldarl
If other players want to run the game without installing Java, that is a path forward. It should work on any OS. The image is built for x86 processors, but Rosetta2 on Mac makes it work for Apple silicon as well.
Managed to win the game after 3 or 4 tries. :-) Thanks for making the game and for reviving it this year for a few improvements.