Add CI/CD pipeline flow documentation

Author: codicecustode

docs/cicd.md

@@ -0,0 +1,22 @@
+## CI/CD Pipeline Flow
+
+CI/CD is implemented using GitHub Actions.
+
+### CI Flow
+
+- Pipeline triggers on Pull Requests to `develop` and `main`
+- Dependencies are installed
+- Syntax validation is performed
+- Docker image build is tested
+- Container health endpoint is validated
+
+If any step fails, the PR cannot be safely merged.
+
+### CD Flow
+
+- Push to `develop` triggers staging deployment
+- Push to `main` triggers production deployment
+- Deployment happens via SSH into Azure VM
+- Docker container is rebuilt and restarted
+
+This ensures continuous delivery with minimal manual intervention.