We use KC with PostgreSQL as backend data store. Backup is done by backing up the PostgreSQL database.
If you actually want to transport configuration across environments (DEV, QA, PROD), then you want to export realms and have it load by KC on startup or import it using the UI.
If you actually want to transport configuration across environments (DEV, QA, PROD), then you want to export realms and have it load by KC on startup or import it using the UI.