automate "metal device create" + "tailscale up"

[vielmetti]

Not documented here / not documented yet are the bootstrapping
commands to get a server online through Equnix Metal, and the
subsequent bootstrap to get Tailscale running so that the server
is on my tailnet.

A fork in the road here, either continue with the Ubuntu + nixpkgs
route, or go all-in and bootstrap through NixOS. For the moment
stick to Ubuntu, just because I can go off-script easier there.

I'll probably have to pre-create a key in the Tailscale console,
then feed that key as an argument into something that
generates a cloud-init for Ubuntu, runs the commands,
sets up the naming etc.

As you are doing that part of things think about secrets bootstrapping
and also system teardown.

[vielmetti]

part of the tailscale is here https://martin.baillie.id/wrote/tailscale-support-for-nixos/ (from 2020, so read with caution)

metal-cli does not have a flake.nix yet.