Official Docker image for running terratest in CI

[madpipeline]

Describe the solution you'd like
It would be very useful to have an official Terratest docker image that we could use for CI. This docker image would include anything necessary to run go test with the terratest library.

Perhaps a set of docker images for each of the supported tool for testing: One for Terraform, packer, docker, etc.

Describe alternatives you've considered

• building our own is useful if something specific is needed, but for the basics, an official image would be useful. We could inherit this image if more things are necessary
• in some cases a private docker registry is not available, and publishing the docker image to a public registry is not allowed, so we end up having to build the docker image for this on every run, which takes time.

Additional context
There are a few ideas on how to approach this out there. An official image would be of great value.