aula-11: ArgoCD + GitLab Runner para GitOps CI/CD

- ArgoCD via Helm com recursos mínimos (~1Gi)
- GitLab Runner com executor Kubernetes
- Exemplo node-bugado com Dockerfile e .gitlab-ci.yml
- Manifests K8s para repositório GitOps
- README.md da aula-03 (liveness + readiness probes)

CLAUDE.md

@@ -18,6 +18,7 @@ This is a workshop repository for teaching Docker and Kubernetes concepts, speci
 - **aula-08/**: OpenTofu - provisioning HA Talos Kubernetes cluster on Hetzner Cloud with CCM and LoadBalancer
 - **aula-09/**: Kubernetes lesson - n8n deployment via Helm (Hetzner Cloud with CSI Driver and multi-tenant support)
 - **aula-10/**: Kubernetes lesson - GitLab deployment via Helm with Container Registry and SSH
+- **aula-11/**: Kubernetes lesson - ArgoCD + GitLab Runner for GitOps CI/CD pipelines
 
 ## Running the Examples
 
@@ -141,6 +142,27 @@ Prerequisites:
 
 To remove: `./cleanup.sh`
 
+### Aula 11 (Kubernetes - ArgoCD + GitLab Runner)
+```bash
+cd aula-11
+export KUBECONFIG=/path/to/aula-08/kubeconfig
+./setup.sh
+```
+Implements GitOps CI/CD pipeline with:
+- GitLab Runner (Kubernetes executor) for CI pipelines
+- ArgoCD for declarative GitOps continuous deployment
+- Integration with GitLab self-hosted (aula-10)
+- Example application with Dockerfile and GitLab CI pipeline
+
+Pipeline flow: git push → GitLab CI (build) → Registry (push) → GitOps repo (update) → ArgoCD (sync) → Kubernetes (deploy)
+
+Prerequisites:
+- Completed Aula 10 (GitLab)
+- NGINX Ingress with LoadBalancer
+- DNS configured for ArgoCD hostname
+
+To remove: `./cleanup.sh`
+
 ## App Behavior
 
 The Node.js app (`app.js`) is intentionally designed to: