App Engine Deployment with Cloud SQL

**Node version**: 12.16.0
**Sails version** _(sails)_: 1.2.4
**ORM hook version** _(sails-hook-orm)_: 2.1.1
**Sockets hook version** _(sails-hook-sockets)_: 2.0.0
**Grunt hook version** _(sails-hook-grunt)_: 4.0.0
**DB adapter & version** _(e.g. sails-mysql@5.55.5)_: sails-postgresql@1.0.2

I was able to deploy with GCP app engine in flex environment. But I am anot able to access my cloudsql postgres resource. As app engine supports different notation [`/cloudsql/INSTANCE_CONNECTION_NAME`] to represent resources in app engine.
https://cloud.google.com/sql/docs/mysql/connect-app-engine-flexible.
If I am using that notation, in application logs. it defaults to localhost for db

No source file, test, or entry point is named. Start by reproducing the Sails 1.2.4 deployment on GCP App Engine Flexible with sails-postgresql 1.0.2, then inspect how the `/cloudsql/INSTANCE_CONNECTION_NAME` value is passed to the database configuration; done means the deployed app connects to Cloud SQL PostgreSQL instead of localhost.

Written by the indexing model from the issue text.