API end-point for available named databases

[isedwards]

Climsoft App is configured with the APIs that are available to users. For example, in the screenshot below "API Latest" is selected.

Climsoft API should contain an end-point that returns the available named databases and their corresponding internal name, e.g. {"test-database": "mariadb_climsoft_db_v4" , "empty-database": "mariadb_climsoft_test_db_v4"}.

Information on available database should be part of the app configuration - possible stored environment variables (or is there a better way?)