Nextcloud data daily, same for the docker configs. Less important/rarely changing data once per week. Automatic sync to NAS and online storage. Irregular and manual sync to an external disk.

7 daily backups, 4 weekly backups, “infinite” monthly backups retained (until I clean them up by hand).

I use both, Traefik on my docker host that’s also used for trying out new stacks, and NPM at work for a config that won’t change (ever, probably).

Yes, the NPM web ui is somewhat easier in regard to proxying targets outside Docker.

Going container-only on a Debian base is a very stable environment without filling up your system with leftovers from experimenting with new services.

And yes, Jellyfin runs fine in a container.

If you don’t want to wait, Owncloud Infinite Scale is basically ready right now, and Opencloud is unlikely to be more than a rebranded fork in the beginning anyway. So should be good for testing the principle right now.

monitors

Don’t underestimate the power draw of multiple monitors.

But while you’re at it: simply turn off different devices on the same power strip and check what actually draws how much.

Authelia

Think about implementing this pretty early, if your plan is to use it for your own services ( which I’d assume).