Migrate doorstep to NixOS

Summary

DHCP server for our laptop VLAN.

Profiles

A list of which profiles should contain:

• Core: rnl
• Filesystem: simple-uefi
• OS: nixos
• Type: vm
• ...

Services

A list of which services will be running and any extra info (e.g. firewall ports, ...):

• WIP

Network configuration

• Interface: WIP
  • IPv4:
  • IPv6:

Metadata

• Hostname: doorstep
• System: x86_64-linux