Adding Caves related issues to FAQ

[renie]

I've had some issues while running the container using docker-compose.

First the Caves won't go up at all. Logs mentioned SOCKET_PORT_ALREADY_IN_USE, what is quite strange for a container. So I've noticed both my server.ini files, Caves and Master, did not have all the setting present on the repo's default config folder.
After copying those files from the repo to my server, that message was gone.

But now my server was going up with 2 florests, instead of a florest and a cave. So I've created a server on the game itself, copied leveldataoverride.lua to my dedicated server, and that is it. Server working like a charm.

I am not sure about why those original server.ini were different from repo's ones. Docker files and scripts sounded ok to me. I could not find a place where the content of those files were being replaced with sed, awk, or something like that. Also I do not know why caves had no leveldataoverride.lua and are still working for some people.

So as I could not really solve the issue, I think it would be nice to have those issues covered somehow until the problems are really solved. Even after it gets solved, I believe it would be nice to have it on FAQ just in case.

With all of that said. Thank you very much for this docker image. Klei's documentation is terrible indeed, I totally agree with you. You deserve a place in haven for saving people so much time and preventing headaches + gastritis.