Comment by n0n

Can you elaborate, why you chose Ubuntu?

Alpine with lbu[0] seems like a perfect fit and looks IMHO less experimental. Also you can provide backups straight via iPXE[1].

Nonetheless, kudos for the slim ubuntu image :)

[0]: https://wiki.alpinelinux.org/wiki/Alpine_local_backup

[1]: https://wiki.alpinelinux.org/wiki/PXE_boot