feat: updated Readme doc

docs/terraform_workflow.md

@@ -0,0 +1,22 @@
+## [Terraform Workflow](https://github.com/clouddrove/github-shared-workflows/blob/master/.github/workflows/terraform_workflow.yml)
+
+This workflow is used to apply and destroy terraform infra using GitHub Actions. It utilizes the workflows defined in `.github/workflows/helm.yml`
+
+#### Usage
+This workflow generates an issue before the apply or destroy step with a required plan in it. If we comment "yes," the workflow will proceed to the next step. However, if we comment "deny," the workflow will be canceled.
+
+#### Example
+```yaml
+name: terraform workflow
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+  workflow_dispatch:
+jobs:
+  prod:
+    uses: clouddrove/github-shared-workflows/.github/workflows/terraform_workflow.yml@master
+    with:  
+        working_directory: './'
+        destroy: true
+```