update .gitignore and add diun service labels in multiple docker-compose files

adguard/docker-compose.yml

@@ -11,6 +11,8 @@ services:
       - config:/opt/adguardhome/conf # app configuration
       - work:/opt/adguardhome/work # app working directory
     restart: always
+    labels:
+      - diun.enable=true
 volumes:
   config:
     driver: local