This is a solid app. We are currently running it using a LEMP stack with no issues. I think it would be fairly easy to wrap in a LAMP Docker container.
I tried deploying it in a LAMP container the other day. It didn't work (it seemed the CSS was messed up, maybe a doc root issue?). Happy to work with anyone on this anytime next week to get it POC in a LAMP container and then packaged for cloudron.