If public key is denied forgejo is setup, but you have an old connection in your authorized_keys file probably form using gitea. Remove the line, it should prompt you to accept public key on next ssh session. This is a basic ssh functionality probably why you were downvoted I guess.

Gitea and forgejo configs were 100% same at some point, check forgejo news for when the last version that supported gitea migrations. That said it should still be pretty close.

Velero is the backup solution for PVCs and k8s way.

I have tried quite a few and found blocky to be very easy and reliable.

I use multiple DoH servers upstream, it sorts out which ones better response times and uses it more often, but splits them still. I have over 20 devices using it and its been running well.

It also can prefetch common domains and caches them per config. I got A 40% cache rate with running 3 of them for redundancy.

I’d recommend finding a cheap VPS using https://lowendbox.com/. I got a 3GB RAM 3 core plan for $32/year this is slightly overkill, prpbably, but it also had higher bandwidth limits. Add wireguard and setup routing for the vps public IP.