Have you checked tailscale? a one click wireguard, free for quite a lot of devices. there is a project to selfhost the control server https://headscale.net/

I’d try to stick to the official recommendations to backup immich: https://immich.app/docs/administration/backup-and-restore/

If you work in IT you will love it. If you work for a company and understand IT jargon you will enjoy it. If you have no connection whatsoever with IT you won’t make the first two chapters 😅

Currently reading The Phoenix Project after postponing it for months, I finally found time during Christmas. So far i’m liking it, though you need to be connected to IT to enjoy it.

I’ve being dealing recently with issues related to DNS resolution in docker containers. Are you using by any chance pihole as well?

it looks like they don’t contemplate to migrate (yet).