See no peers for some torrent(s)? Add more tracker(s) from Transmission
cd directory where Dockerfile docker build -t transmission-tracker-add:latest .
or take image docker pull andrewmhub/transmission-tracker-add
docker run --net=host -d -e HOSTPORT=localhost:9091 -e TR_AUTH=user:password --name=transmission-tracker-add andrewmhub/transmission-tracker-add:latest
if need use another torrent tracker list use docker run env
-e TORRENTLIST=https://raw.githubusercontent.com/user/trackerslist/master/mylist.txt
you use transmission daemon in docker then read Docker Documentation