Add Docker compose templates and configurations

docker-templates/watchtower/docker-compose.yml

@@ -0,0 +1,29 @@
+services:  
+  watchtower:
+    image: containrrr/watchtower:latest
+    container_name: watchtower
+    restart: unless-stopped
+    networks:
+      - homelab-network
+    volumes:
+      - /var/run/docker.sock:/var/run/docker.sock
+    environment:
+      - DOCKER_API_VERSION=1.52
+      - WATCHTOWER_CLEANUP=true
+      - WATCHTOWER_INCLUDE_RESTARTING=true
+      - WATCHTOWER_SCHEDULE=0 0 4 * * *  # 4 AM daily
+      - WATCHTOWER_NOTIFICATIONS=shoutrrr
+      # - WATCHTOWER_NOTIFICATION_URL=${WATCHTOWER_NOTIFICATION_URL}
+    labels:
+      - com.getarcaneapp.arcane.icon=https://cdn.jsdelivr.net/gh/selfhst/icons@main/svg/watchtower.svg
+      - 'homelab.category=infrastructure'
+      - 'homelab.description=Automatic Docker container updates'
+
+
+networks:
+  homelab-network:
+    external: true
+
+
+x-arcane:
+  icon: https://cdn.jsdelivr.net/gh/selfhst/icons@main/svg/watchtower.svg