@alcinnz Aha?! I've never heared of that until you mentioned it. Also looks like a nice approach to simplify the whole process of installing and running a mailserver.
Personally, I'll stick with citadel since I've been running it for over a decade now. Without a single incident (except for provider side outages I have no business with).
Switching to the docker install was as easy as copying the data directory (for persistence).