Simple container with running instance of MariaDB. I hihly recommend you to mount $DB_DATADIR outside of this container!
One volume same as $DB_DATADIR
User with this name will be created at new database. Default 'user'.
User will be identified with this password. Default 'secret'.
Database with this name will be created. Default 'db'.
Path of MariaDB data dir. Default '/var/lib/mysql' and I don't recommend you to change it.