Deploys a Superset instance on dokku.
This uses a dedicated postgres DB for superset, identified by DATABASE_URL.
Another DB is used and managed by ecospheres-dashboard-backend, identified in this project by DOKKU_POSTGRES_AQUA_URL.
dokku postgres:create dashboard
dokku postgres:link dashboard dashboard # internal data, this app
dokku postgres:link dashboard-backend dashboard # business data, managed by ../ecospheres-dashboard-backend
dokku config:set SUPERSET_CONFIG_PATH=/app/superset_config.py FLASK_APP=superset