* upload custom dvd with nixos minimal via sftp
* boot
* add ssh authorized key for root
* `nix run github:numtide/nixos-anywhere -- root@v2202401214093251449.happysrv.de --flake '.#cupsnet'`
* reboot
* add public key to sops to decrypt secrets, get the key by ` ssh-keyscan cupsnet.cyplo.dev  | ssh-to-age`
* reencrypt secrets if needed