Documentation
PostgreSQL Module
The PostgreSQL module allows you to have a PostgreSQL database. You only specify the port. PostgreSQL is then enabled to listen only for local connections.
You should handle schemas and schema migrations as part of your app.
Enabling the PostgreSQL will enabled persistence, which means that deployments will involve a short downtime.
NOTE: We currently do not backup your data. Moreover, we still consider this module beta software. You should only use this for things you wouldn't mind losing.