Connection information is configured in code through [1], see [2] for an example.
It's very easy to run other workloads. Either by directly invoking Python functions from tasks or by writing own commands (operators)[3].
There is a command line. It's the interface for running from external schedulers (jenkins, cron)[4] & [5]
[1] https://github.com/mara/mara-db
[2] https://github.com/mara/mara-example-project/blob/master/app...
[3] https://github.com/mara/data-integration/blob/master/data_in...
[4] https://github.com/mara/data-integration/raw/master/docs/exa...
[5] https://github.com/mara/data-integration/raw/master/docs/exa...
