Settings that go into ca.json. See the step-ca manual for more information. The easiest way to configure this module would be to run step ca init to generate ca.json and then import it using builtins.fromJSON. This article may also be useful if you want to customize certain aspects of certificate generation for your CA. You need to change the database storage path to /var/lib/step-ca/db.
The services.step-ca.settings.address option will be ignored and overwritten by services.step-ca.address and services.step-ca.port.