feat: Terragrunt to create the Route53 hosted zone

[patheard]

Summary

This hosted zone holds all DNS records required by the Forms service.

Also included:

• Terragrunt plan and apply GitHub workflows
• Fix to tfstate.tf S3 remote state to enable versioning.
• Fix to .gitignore to allow Terraform lock files. This allow us
  to pin provider/module versions for consistent Terraform
  plan and apply commands.
• Makefile with common commands.

Related

• Implement Terragrunt to simplify staging and production environments. #28
• cds-snc/platform-sre-security-support#47

[bryan-robitaille]

LGTM

[github-actions]

Scratch: hosted_zone

✅   Terraform Format: success
✅   Terraform Plan: success
✅   Conftest: success

Plan: 1 to add, 0 to change, 0 to destroy

Show plan

Resource actions are indicated with the following symbols:
  + create

Terraform will perform the following actions:

  # aws_route53_zone.form_viewer will be created
  + resource "aws_route53_zone" "form_viewer" {
      + arn           = (known after apply)
      + comment       = "Managed by Terraform"
      + force_destroy = false
      + id            = (known after apply)
      + name          = "forms-scratch.cdssandbox.xyz"
      + name_servers  = (known after apply)
      + tags          = {
          + "CostCentre" = "forms-platform-scratch"
          + "Terraform"  = "true"
        }
      + tags_all      = {
          + "CostCentre" = "forms-platform-scratch"
          + "Terraform"  = "true"
        }
      + zone_id       = (known after apply)
    }

Plan: 1 to add, 0 to change, 0 to destroy.

─────────────────────────────────────────────────────────────────────────────

Saved the plan to: plan.tfplan

To perform exactly these actions, run the following command to apply:
    terraform apply "plan.tfplan"
Releasing state lock. This may take a few moments...

Show Conftest results

9 tests, 9 passed, 0 warnings, 0 failures, 0 exceptions