This is the compose file I use, with Gluetun setup with ProtonVPN. I edited it to remove some personal machine stuff so adapt volumes to your liking.

version: "2.1"
services:
  jackett:
    image: lscr.io/linuxserver/jackett:latest
    container_name: jackett
    network_mode: service:gluetun
    environment:
      - PUID=1000
      - PGID=1000
      - TZ=Europe/London
    volumes:
      - ./data:/config
      - ./downloads:/downloads
    restart: unless-stopped
    depends_on:
      - gluetun

  qbittorrent:
    image: lscr.io/linuxserver/qbittorrent:4.5.5-r0-ls291
    container_name: qbittorrent
    network_mode: service:gluetun
    environment:
      - PUID=1000
      - PGID=1000
      - TZ=Etc/UTC
      - WEBUI_PORT=8084
    volumes:
      - a-place/qbittorrent/config:/config
      - a-place/qbittorrent:/downloads
    restart: unless-stopped
    depends_on:
      - gluetun

  flaresolverr:
    container_name: flaresolverr
    network_mode: service:gluetun
    environment:
      - LOG_LEVEL=info
    restart: unless-stopped
    image: ghcr.io/flaresolverr/flaresolverr:latest
    depends_on:
      - gluetun

  gluetun:
    image: qmcgaw/gluetun
    container_name: gluetun
    networks:
      pirate_net:
    cap_add:
      - NET_ADMIN
      - SYS_MODULE
    environment:
      - VPN_SERVICE_PROVIDER=custom
      - VPN_TYPE=wireguard
    ports:
      - 9117:9117 # Jackett
      - 8084:8084
      - 6881:6881
      - 6881:6881/udp
      - 8191:8191 # Flaresolverr
    volumes:
      - ./config/:/gluetun/wireguard/

networks:
  pirate_net:
    driver: bridge