Convert to TF 0.12. Add tests. Add Codefresh test pipeline. Add slash-command-dispatch GitHub Actions workflow

[aknysh]

what

• Port module to Terraform 0.12
• Pin all providers
• Add example for testing
• Add bats and terratest for the example
• Add Codefresh badge to point to the test pipeline in terraform-modules project
• Update README
• Add slash-command-dispatch GitHub Actions workflow

why

• Module currently does not work with 0.12. Much easier syntax
• Better regression control
• Automatically test the example on every commit and pull request
• Provision resources on AWS in the test account and check the outputs for the correct values
• terraform-modules project contains pipelines for all terraform modules
• slash-command-dispatch GitHub Actions workflow: In a repo with the GitHub actions workflow present, when a PR is opened, we can comment on the PR with commands /build-readme and /terraform-fmt to rebuild README and format terraform code and push the changes back to the PR repo

related

• Closes terraform 0.12 syntax, submodules modules version upgrade and count fixes #16

[goruha]

/codefresh run test