According to the logs, each container starts or stops based on its previous state after backup in this mode. Assuming MariaDB is before Vaultwarden in terms of sequence, it should stop Vaultwarden first, backup, start Vaultwarden, then stop MariaDB, backup. At this time, Vaultwarden will lose connection with the database, right? If we put these interdependent containers into a group, can this problem be solved?