avoid unnecessary nested content

docker-monitoring/docker-compose.yml

@@ -0,0 +1,17 @@
+name: docker-monitoring
+
+services:
+  watchtower:
+    hostname: watchtower
+    image: containrrr/watchtower
+    environment:
+      WATCHTOWER_INCLUDE_RESTARTING: true
+      WATCHTOWER_INCLUDE_STOPPED: true
+      WATCHTOWER_CLEANUP: true
+      WATCHTOWER_NOTIFICATION_REPORT: true
+      WATCHTOWER_NOTIFICATION_URL: /run/secrets/watchtower_notification_url
+    volumes:
+      - /var/run/docker.sock:/var/run/docker.sock
+      # Secrets
+      - ${NASCOMPOSE_SERVICES?}/docker-monitoring/secrets/notification_url:/run/secrets/watchtower_notification_url:ro
+    restart: unless-stopped