Add CI/CD pipeline documentation

README.md

@@ -155,6 +155,17 @@ This module has been migrated from consul-template to vault-agent for better App
 
 The legacy consul-template role is archived as `consul_template-legacy` for reference.
 
+## CI/CD Pipeline
+
+This module includes a comprehensive CI/CD pipeline that runs:
+- **TFLint**: Terraform linting and best practices
+- **Tfsec**: Security scanning for Terraform code
+- **Checkov**: Compliance and security policy checks
+- **Terraform Validate**: Configuration validation
+- **SonarQube**: Code quality analysis
+
+The pipeline runs automatically on pushes to master/main and on pull requests.
+
 ## Notes
 
 - Ensure the Vault AppRole auth backend is enabled before using this module