Where are the logs for Groove Basin?

I just installed Groove Basin in Arch Linux. I could access the web interface once. When I tried to play music from the library so sound came up. After that, the connection with the server was gone, and after restarting, killing the node process, rebooting and what not, I can't get it to work again. I would like to take a look at the logs, but I can't find them anywhere.

Any ideas?