That guide did help me find out about TS_ env vars, which I don’t think are well documented elsewhere. From what I understand they’re container specific? I think they’re set up by containerboot, which is what the tailscale container image uses to boot.
TS_DEST_IP in particular is a game-changer. Docker needs more options for forwarding ports and interfaces. 🙁 “ports:” only forwards to the host and that’s about it.
Best of luck.
You too, what you’re trying to do looks like a challenge as well.