Michael Bell from Bellular Studios just did a video about it if you want something to listen to. It is pretty much all of it that was said here.
How Baldur's Gate 3 Humbled AAA

You can also make it launch the Vulkan version with skipping the launcher. Seehttps://gamepretty.com/baldurs-gate-3-how-to-skip-launcher-and-use-desired-graphical-api-vulkan-dx11/

I use Docker Mailserver . It is pretty lightweight, but it does not come with any fancy GUI for configuration, that is done on the command line mostly.

It is pretty straight forward if you use the provided docker-compose file with the nginx internal proxy in it. Just add traefik as per usual to the internal port 8536 of the proxy container.

If you have configured that tailscale node as Subnet Router or Exit Node then yes, that is supposed to happen.