hey, so i have the same issue as skwisgaarz.
i'm able to run the map fine if i copy it out of the docker and run it locally.
however, i cannot connect to the game hosted in the docker.
...
ok, fixed it,
from the patch notes:
* Added -public 1/0 flag to dedicated server again, Allows players to host local lan only servers
so changed it to 1 (public) in the docker settings and it works again.
seems like if set to 0 you can only join on local LAN.
..
nope, thats a lie. it shows up in steam. but still cannot connect to the game