I think we should add rtorrent by diameter to the repo.
I don't use rtorrent, but i spent once a whole day trying to run it. This one comes ready to start, no php, apache, libtorrent fiddling around.
edit: Also roaming today in the hub found this one
https://hub.docker.com/r/jwilder/nginx-proxy/ This will act as a reverse proxy for all containers exposing ports, passing the domain name as env var.
For this you will have to move the port 80 in omv to another one.