sources
nix instructions: https://github.com/NixOS/nixpkgs/blob/master/pkgs/applications/networking/cluster/k3s/README.md
tailscale operator
helm repo add tailscale https://pkgs.tailscale.com/helmcharts
helm repo update
helm upgrade \
--install \
tailscale-operator \
tailscale/tailscale-operator \
--namespace=tailscale \
--create-namespace \
--set-string oauth.clientId="<OAauth client ID>" \
--set-string oauth.clientSecret="<OAuth client secret>" \
--wait