I was having a bunch of issues. I was trying to modify the config file with notepad++ in windows. I kept getting errors and it looked like the config file wasn't always saving. Reading above, I noticed that you were using nano to edit the config file. Once I used nano to edit the config file, I got it to work. Instead of a config file, could I recommend that you just use docker variables? I'm not super familiar with linux, so it took me longer to figure out than I'd like to admit. I also don't know much about docker programming, so I don't know how easy that is.
I got it running right now (although haven't had a new movie to add to my server yet). Thank you for this!