In System (porta) database configuration we apply PostgreSQL-specific configuration if the database connection string starts with "postgresql", see https://github.com/3scale/porta/blob/cfe45001b1f88982ffffcc112748d953008db96b/config/examples/database.yml#L20

However, according to the PostgreSQL documentation, postgres:// is also a valid schema for the connection string: https://www.postgresql.org/docs/current/libpq-connect.html#LIBPQ-CONNSTRING-URIS

The URI scheme designator can be either postgresql:// or postgres://.

So the request is to change the pattern in the database.yml to /^postgres/.