Bootstrap

Manual operations to set up an host.

Reinstall an host

Make an ISO and boot with it

rm -rf result
nix build .#nixosConfigurations.iso.config.system.build.isoImage

Clone this repository on the host
Format the disk with the format-script
Set up persistent directories/file
```
./scripts/setup-opt-in-state.sh
```
Copy the host's private key
- For new machine
  - Generate the host's key ssh-keygen -t ed25519 -f ssh_host_ed25519_key
  - Convert host key to age key for secret cat ssh_host_ed25519_key.pub | ssh-to-age
  - Generate a new key for the user-host couple via age age-keygen
Set up an access to gitlab via ssh (to fetch secrets repo)
Install host
```
sudo nixos-install --flake .#<host>
```
ask root password but can be ignored
After install, ask for root password but doesn't requires it after reboot
Reboot