add SKIP_UNBOUND_HEALTHCHECK to docker-compose.yml

docker-compose.yml

@@ -5,6 +5,7 @@ services:
       image: mailcow/unbound:1.19.1
       environment:
         - TZ=${TZ}
+        - SKIP_UNBOUND_HEALTHCHECK=${SKIP_UNBOUND_HEALTHCHECK:-n}
       volumes:
         - ./data/hooks/unbound:/hooks:Z
         - ./data/conf/unbound/unbound.conf:/etc/unbound/unbound.conf:ro,Z