Thanks. Yes, CapRover seems really nice. And also see Dokku. At some point in the past I decided both did not suit my needs. I can't remember the details exactly, but one thing with CapRover was that auth goes via username and password only, which I don't feel is safe enough (MyPaas uses RSA key pairs).

Anyway, I started out by tying Docker and Traefik together with a mix of Python and bash scripts. Eventually I decided to roll that together into something easier to maintain, so its also useful for others. And "others" includes my future self ;)