Refactor: Create downloaders stack for VPN-routed services

- Created new downloaders stack with Gluetun + qBittorrent unified
- Moved Gluetun from core stack to downloaders stack
- Moved qBittorrent from media-management to downloaders stack
- Uses network_mode: service:gluetun for better maintainability
- Eliminates cross-stack container ID dependencies
- Both services now start/stop together as a logical unit

docker-compose/downloaders.yml

@@ -0,0 +1,67 @@
+version: "3.9"
+
+services:
+  # VPN client for routing download client traffic through Surfshark
+  gluetun:
+    image: qmcgaw/gluetun:latest
+    container_name: gluetun
+    hostname: gluetun
+    cap_add:
+      - NET_ADMIN
+    devices:
+      - /dev/net/tun:/dev/net/tun
+    ports:
+      - "8081:8080"  # qBittorrent WebUI
+      - "6881:6881"  # qBittorrent torrent port
+      - "6881:6881/udp"
+      - "8888:8888/tcp"  # HTTP proxy
+      - "8388:8388/tcp"  # Shadowsocks
+      - "8388:8388/udp"
+    volumes:
+      - ${STACK_DIR}/gluetun:/gluetun
+    environment:
+      - VPN_SERVICE_PROVIDER=surfshark
+      - VPN_TYPE=openvpn
+      - OPENVPN_USER=${SURFSHARK_USER}
+      - OPENVPN_PASSWORD=${SURFSHARK_PASSWORD}
+      - SERVER_COUNTRIES=${VPN_COUNTRY:-Netherlands}
+      - FIREWALL_VPN_INPUT_PORTS=6881
+      - TZ=${TZ}
+      - UPDATER_PERIOD=24h
+    networks:
+      - homelab-network
+      - traefik-network
+    labels:
+      - "traefik.enable=true"
+      # qBittorrent routing through Gluetun
+      - "traefik.http.routers.qbittorrent.rule=Host(`qbit.${DOMAIN}`)"
+      - "traefik.http.routers.qbittorrent.entrypoints=websecure"
+      - "traefik.http.routers.qbittorrent.tls=true"
+      - "traefik.http.routers.qbittorrent.tls.certresolver=letsencrypt"
+      - "traefik.http.routers.qbittorrent.middlewares=authelia@docker"
+      - "traefik.http.services.qbittorrent.loadbalancer.server.port=8080"
+    restart: unless-stopped
+
+  # Torrent client
+  qbittorrent:
+    image: lscr.io/linuxserver/qbittorrent:latest
+    container_name: qbittorrent
+    hostname: qbittorrent
+    network_mode: "service:gluetun"  # Route through VPN
+    environment:
+      - PUID=${PUID}
+      - PGID=${PGID}
+      - TZ=${TZ}
+      - WEBUI_PORT=8080
+    volumes:
+      - ${STACK_DIR}/qbittorrent/config:/config
+      - ${MEDIA_DIR}/downloads:/downloads
+    depends_on:
+      - gluetun
+    restart: unless-stopped
+
+networks:
+  homelab-network:
+    external: true
+  traefik-network:
+    external: true