Package card api terraform into reusable and updatable component

Description

In order to provide a paved path/road for front end reporting for all projects, extract card api terraform into a module

Further Details

We will allow the configuration of:

• Min scaling - required
• Max scaling - optional, default to 1
• Rates - default to not set (i.e. using image default)

Explicitly not configurable:

• The image deployed (it should always use latest for now)
• Number of client ids

Task List

• Create repository for module in https://gitlab.developers.cam.ac.uk/uis/devops/infra/terraform
• Ensure terraform module is packaged to terraform registry in gitlab.
• Use latest tag for docker image to deploy.

Acceptance criteria

• Other Wilson/DevOps services can use
• Exists as a terraform module in separate repository available in terraform registry
  • Specific allowed settings in variables listed above.
• Documentation walks user through full process including library usage from:
  • Start - bare GCP bootstrap repo
  • To finish - can see logs in GCP
  • And update procedure