Looking at https://docs.kraft.cloud/guides/mariadb/ with the Docker stuff in there I'd half assumed maybe DB instances worked differently from unikernel instances or something
Also because of this other comment:
> Because KraftCloud leverages Unikraft, a unikernel library OS project, we are single-process. Postgres is multi-process since it uses the fork() syscall. If you require Postgres, we can set it up for you as a managed service