Leave a comment on the post and I'll DM you the join URL. Feel free to share it with a friend, but not post it publicly.
Current player limit is the default 4, but I may increase it if we actually get that many players joining at the same time.
Edit: Someone asked about a chat, so I created a steam group for the server, you should be able to join that here: https://steamcommunity.com/chat/invite/EblxtBh7
Give it a bit, they didn't drop mod support just made a bunch of changes.