Add watchtower, fixes and prepare for new caddy handling

monitoring/docker-compose.yml

@@ -2,8 +2,10 @@ version: '3'
 
 services:
   grafana:
-    image: grafana/grafana
+    image: grafana/grafana:latest
     restart: always
+    labels:
+      com.centurylinklabs.watchtower.enable: true
     env_file:
       - .env
       - .secret.env
@@ -12,5 +14,14 @@ services:
     user: "104"
     ports:
       - 3001:3000/tcp
+    networks:
+      services:
+        aliases:
+          - grafana
+
 volumes:
   grafana-data:
+
+networks:
+  services:
+    external: true