Docker appstore distro

I‘m currently setting up a home server box for my friend. In my home setup I use unraid and really like the community apps and the capability of autoupdating the docker apps.

I will use proxmox as a base, opnsense virtualized and an adguard container but I think if he is using the system he will soon start to like it and start into homelabbing as well and I want to make his start as easy as possible. So I am looking for a system with a click and go appstore. Can you suggest anything? Unraid is not possible bc licence fees.