fix: change checkmk container restart policy to 'unless-stopped'

checkmk/compose.yaml

@@ -13,7 +13,7 @@ services:
     ports:
       - 5000:5000
       - 6776:8000
-    restart: always
+    restart: unless-stopped
     labels:
       - "traefik.enable=true"
       - "traefik.docker.network=proxy"
@@ -47,4 +47,4 @@ networks:
   proxy:
     external: true
 volumes:
-  sites:
+  sites: