The ARRs

Finally, I've added radarr, sonarr, lidarr, and prowlarr to the VPN stack.

services:

  ### VPN SERVICE ###

  gluetun:
    image: qmcgaw/gluetun
    container_name: gluetun
    cap_add:
      - NET_ADMIN
    ports:
      - 8888:8888/tcp
      - 8388:8388
      - 8112:8112 #deluge webui
      - 6881:6881 #deluge inbound torrent traffic
      - 9080:9080 #sabnzb
      - 8686:8686 #lidarr
      - 9696:9696 #prowlarr
      - 7878:7878 #radarr
      - 8989:8989 #sonarr
    volumes:
      - /var/lib/gluetun:/gluetun
    environment:
      - VPN_SERVICE_PROVIDER=mullvad
      - VPN_TYPE=wireguard
      - WIREGUARD_PRIVATE_KEY=provided by mullvad
      - WIREGUARD_ADDRESSES=provided by mullvad
      - SERVER_COUNTRIES=USA
      - TZ=America/New_York
      - UPDATER_PERIOD=24h
      - UNBLOCK=usenetserver.com
      - FIREWALL_OUTBOUND_SUBNETS=192.168.0.0/24
    devices:
      - /dev/net/tun:/dev/net/tun
    restart: unless-stopped

### DOWNLOAD CLIENTS ###

  deluge:
    image: lscr.io/linuxserver/deluge:latest
    container_name: deluge
    environment:
      - PUID=1000
      - PGID=1000
      - TZ=America/New_York
      - DELUGE_LOGLEVEL=error
    volumes:
      - /mnt/torrents:/torrents
      - /var/lib/deluge:/config
    network_mode: container:gluetun
    restart: unless-stopped

  sabnzbd:
    image: lscr.io/linuxserver/sabnzbd:latest
    container_name: sabnzbd
    environment:
      - PUID=1000
      - PGID=1000
      - TZ=America/New_York
    volumes:
      - /mnt/torrents:/torrents
      - /var/lib/sabnzbd:/config
    network_mode: container:gluetun
    restart: unless-stopped

### ARR STACK ###

  lidarr:
    image: lscr.io/linuxserver/lidarr:latest
    container_name: lidarr
    environment:
      - PUID=1000
      - PGID=1000
      - TZ=America/New_York
    volumes:
      - /mnt/media/music:/music
      - /mnt/torrents:/torrents
      - /var/lib/lidarr:/config
    network_mode: container:gluetun
    restart: unless-stopped

  prowlarr:
    image: lscr.io/linuxserver/prowlarr:latest
    container_name: prowlarr
    environment:
      - PUID=1000
      - PGID=1000
      - TZ=America/New_York
    volumes:
      - /var/lib/prowlarr:/config
    network_mode: container:gluetun
    restart: unless-stopped

  radarr:
    image: lscr.io/linuxserver/radarr:latest
    container_name: radarr
    environment:
      - PUID=1000
      - PGID=1000
      - TZ=America/New_York
    volumes:
      - /mnt/media/holiday_movies:/holiday_movies
      - /mnt/media/movies:/movies
      - /mnt/torrents:/torrents
      - /var/lib/radarr:/config
    network_mode: container:gluetun
    restart: unless-stopped

  sonarr:
    image: lscr.io/linuxserver/sonarr:latest
    container_name: sonarr
    environment:
      - PUID=1000
      - PGID=1000
      - TZ=America/New_York
    volumes:
      - /mnt/media/tvshows:/tvshows
      - /mnt/torrents:/torrents
      - /var/lib/sonarr:/config
    network_mode: container:gluetun
    restart: unless-stopped
networks: {}

Later on, I add LazyLibrarian to the stack as can be seen here.