The qBittorrent project aims to provide an open-source software alternative to µTorrent.

docker-compose

---
version: "2.1"
services:
  qbittorrent:
    image: linuxserver/qbittorrent
    container_name: qbittorrent
    environment:
      - PUID=1000
      - PGID=100
      - TZ=Australia/Tasmania
      - UMASK=022
      - WEBUI_PORT=8080
    volumes:
      - /path/to/appdata/config:/config
      - /path/to/downloads:/downloads
    ports:
      - 6881:6881
      - 6881:6881/udp
      - 8080:8080
    restart: unless-stopped