mount the MariaDB data volume at the right path
The bitnami image we are using stores the DB data at /bitnami/mariadb
as per:
https://hub.docker.com/r/bitnami/mariadb#:~:text=Persisting,database
We were mounting the data volume at the wrong location, so the DB
data was being wiped out on container restart.
Also piggybacked some resource renaming for clarity
Bug: T385319