So do I, I’m just using it in gluetun so that I can pass all the traffic from this stack of containers in this yaml file through it and not other traffic. Gluetun is a pretty cool project, it made it easy too setup a connection to mullvad. https://github.com/passteque/gluetun

I think they have to be for the gluetun(vpn container) dependency, but I could be mistaken. It does make it easier to docker compose up -d and have the whole stack startup.

Here is my docker-compose.yml file with sensitive info scrubbed, its been working for me for a few years now. It sounds like the problem you are having is not with Docker but something in your configuration once the container is running. Feel free to message me if you have questions.

services:
  gluetun:
    container_name: gluetun
    cap_add:
      - NET_ADMIN
    image: qmcgaw/gluetun:v3
    devices:
      - /dev/net/tun:/dev/net/tun
    environment:
      - VPN_SERVICE_PROVIDER=
      - VPN_TYPE=
      - WIREGUARD_PRIVATE_KEY=
      - WIREGUARD_ADDRESSES=
      - SERVER_COUNTRIES=
      - DNS_ADDRESS=
      - HTTP_CONTROL_SERVER_ADDRESS=
      - HTTPPROXY_LISTENING_ADDRESS=
      - TZ=America/New_York
    ports:
      - 3129:3129/tcp # HTTP proxy
      - 8388:8388/tcp # Shadowsocks
      - 8388:8388/udp # Shadowsocks
      - 9047:9047 # Gluten http_control
      - 9046:9046 # qbittorent webui
      - 9696:9696 # Prowlarr
      - 7878:7878 # Radarr
      - 8989:8989 # Sonarr
      - 8686:8686 # Lidarr
    volumes:
      - /etc/localtime:/etc/localtime:ro
    restart: 'unless-stopped'

  qbittorrent:
    image: lscr.io/linuxserver/qbittorrent:5.1.4
    container_name: qbittorrent
    network_mode: "service:gluetun"
    environment:
      - PUID=1000
      - PGID=1000
      - TZ=America/New_York
      - WEBUI_PORT=9046
    volumes:
      - /mnt/drive/volumes/qbittorrent/data:/config
      - /mnt/nas/Downloads:/downloads
    depends_on:
      - gluetun

  prowlarr:
    container_name: prowlarr
    network_mode: "service:gluetun"
    image: ghcr.io/hotio/prowlarr:latest
    volumes:
      - /mnt/drive/volumes/prowlarr/config:/config
      - /etc/localtime:/etc/localtime:ro
    depends_on:
      - gluetun
    restart: 'unless-stopped'

  byparr:
    container_name: byparr
    image: ghcr.io/thephaseless/byparr:latest
    network_mode: "service:gluetun"
    init: true
    depends_on:
      - gluetun
    restart: 'unless-stopped'

  radarr:
    container_name: radarr
    network_mode: "service:gluetun"
    image: ghcr.io/hotio/radarr:latest
    volumes:
      - /mnt/drive/volumes/radarr/config:/config
      - /mnt/movies:/mnt/Movies
      - /mnt/nas/Downloads:/downloads
      - /etc/localtime:/etc/localtime:ro
    depends_on:
      - gluetun

  sonarr:
    container_name: sonarr
    network_mode: "service:gluetun"
    image: ghcr.io/hotio/sonarr:latest
    volumes:
      - /mnt/drive/volumes/sonarr/config:/config
      - /mnt/nas/TV:/mnt/TV
      - /mnt/nas/Downloads:/downloads
      - /etc/localtime:/etc/localtime:ro
    depends_on:
      - gluetun
    restart: 'unless-stopped'

  lidarr:
    container_name: lidarr
    network_mode: "service:gluetun"
    image: ghcr.io/hotio/lidarr:pr-plugins
    volumes:
      - /mnt/drive/volumes/lidarr/config:/config
      - /mnt/nas/Music:/mnt/Music
      - /mnt/nas/Downloads:/downloads
      - /etc/localtime:/etc/localtime:ro
    depends_on:
      - gluetun
    restart: 'unless-stopped'