Added default hostname and domainname in docker-compose.yml

docker-compose.yml

@@ -5,6 +5,8 @@ services:
         build: ./rsnapshot
         container_name: rsnapshot-rsnapshot
 #        restart: unless-stopped
+#        hostname: rsnapshot
+#        domainname: example.com
         networks:
             rsnapshot.internal.docker:
                 aliases: