tailscaled is waited for before tailscale up, a tailscaled that already runs on
the runner is not taken over and down leaves a daemon it did not start, sudo is
used only when the job is not root, an exact version is required to install
(with an optional sha256 of the archive), and the guide states when the node is
ephemeral and calls @main until the release.
Refs #185
Task: MIL-012#4
actions/connect-tailscale joins a Tailscale network for a deployment job, with
a guide and offline tests. Whether tailscaled survives to the next step is
still open (MIL-012 task 4).
Refs #185
Task: MIL-012#4
Tirsvad