Homelab updates: rook ceph instead of longhorn

A few homelab updates.

I added lighting. I printed a rack mount for two mini-PCs and one thin client.

I rolled out rook ceph instead of longhorn, and the storage became much nicer and more stable. I replaced the dubious Chinese SSDs with honest nvme drives.

For now I do backups with Velero+restic to my home computer. But I have not tested a restore yet, and I very much want to.