add atlas to hosts

Summary

A clear description of what this host will do.

Profiles

A list of which profiles should contain:

• Core: rnl
• Filesystem: zfs-raid6
• OS: nixos
• Type: hypervisor
• ...

Services

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

• ...
• ...

Network configuration

• Interface:
  • IPv4:193.136.164.72/26
  • IPv62001:690:2100:81::72/64

Additional context

Add any other context about the host here.

Metadata

• Hostname: atlas
• System: x86_64-linux