So I've run into a dead end, and now rutorrent isn't working for me...
I needed to expose the SCGI Port of rtorrent to get a couple other media-downloading-related dockers to connect to it.
I downloaded the rtorrent.rc file using SMB and modified it on a windows machine.
I used the FTP server to put the new rtorrent.rc in its proper place, ran chmod 777 on the rtorrent.rc in Appdata using filezilla, opened up port 5000 on the docker and rebooted the rutorrent docker.
It says the following:
[30.05.2018 17:41:05] WebUI started.
[30.05.2018 17:41:06] No connection to rTorrent. Check if it is really running. Check $scgi_port and $scgi_host settings in config.php and scgi_port in rTorrent configuration file.
I honestly don't know what else to do other than deleting the docker, wiping out the appdata for rutorrent, and re-downloading it and re-setting it up.
Another problem is where it is set to download: It always wants to put new torrents at "/downloads/incoming/" when I want it to JUST download to "/downloads/." I modded the settings but everytime I restart the docker, it reverts back to /downloads/incoming/.
EDIT: Blew away the appdata and reinstalled rutorrent, now it's working, but I still need to know how to expose SCGI and how to fix it to download to just "/downloads/""
EDIT2: Got SCGI to work.