Taito CLI integration test suite based on full-stack-template.

Taito CLI is tested by:

• Building and deploying this project normally using a CI/CD pipeline (see cloudbuild.yaml)
• Running a bunch of Taito CLI commands against a remote environment (see test)

These tests can be run on any environment as Taito CLI image and environment details (Cloud provider, Kubernetes, Postgres, etc.) are defined for the Google Cloud Build as build variables. If you want to use some other CI/CD for running the tests, just add an appropriate CI/CD script.