Bootstrapping NixOS on 'k3s-h' kubernetes node

'k3s-h' is an intel N100 'T9 Plus mini PC' from China.

CPU:
- 4 Cores
Memory:
- 16GB
Disk:
- 1TB onboard ssd
NIC:
- 1GBe dual nic

See k3s-f for more details on the installation steps.