refactor: migrar GitLab → Gitea (aulas 10, 11, 13)

- Aula 10: Gitea + Registry + Actions + Runner (substituiu GitLab)
  - gitea-values.yaml: PostgreSQL standalone, Valkey standalone, ~800Mi RAM
  - setup.sh/cleanup.sh: namespace gitea, Helm gitea-charts/gitea + actions
  - README.md: documentação completa com de→para (GitLab/Harbor/Tekton vs Gitea)

- Aula 11: ArgoCD (GitOps) — removido GitLab Runner (runner vive na aula-10)
  - setup.sh: só ArgoCD, integração SSH com Gitea
  - node-bugado/.gitea/workflows/ci.yml: pipeline convertida

- Aula 13: Container Factory — atualizado para Gitea
  - setup.sh/cleanup.sh: referências GitLab → Gitea
  - pipelines/postgresql/ci.yml: Gitea Actions workflow
  - README.md: conexão com act_runner explicada

- CLAUDE.md: tabela de aulas atualizada

aula-10/gitea-values.yaml

@@ -0,0 +1,207 @@
+# =============================================================================
+# Gitea Helm Chart - Configuração para Hetzner CAX11
+# =============================================================================
+#
+# Esta configuração:
+#   - Usa NGINX Ingress Controller externo (instalado na aula-08)
+#   - PostgreSQL standalone (sem HA) para economia de recursos
+#   - Valkey standalone (sem cluster) para economia de recursos
+#   - Container Registry (packages) habilitado
+#   - Gitea Actions habilitado
+#   - ~800Mi de recursos para Gitea + ~256Mi PostgreSQL + ~64Mi Valkey
+#   - act_runner instalado separadamente via gitea-charts/actions
+#
+# Valores dinâmicos (configurados via --set no setup.sh):
+#   - ingress.hosts[0].host
+#   - gitea.config.server.DOMAIN
+#   - gitea.config.server.ROOT_URL
+#   - gitea.config.server.SSH_DOMAIN
+#
+# =============================================================================
+
+# Réplicas
+replicaCount: 1
+
+# Imagem rootless (mais segura)
+image:
+  rootless: true
+
+# =============================================================================
+# RECURSOS - Otimizado para CAX11 (4GB RAM)
+# =============================================================================
+resources:
+  requests:
+    memory: 512Mi
+    cpu: 100m
+  limits:
+    memory: 1Gi
+    cpu: 500m
+
+# =============================================================================
+# INGRESS - Usa NGINX Ingress Controller externo (aula-08)
+# =============================================================================
+ingress:
+  enabled: true
+  className: nginx
+  annotations:
+    nginx.ingress.kubernetes.io/proxy-body-size: "0"
+    nginx.ingress.kubernetes.io/proxy-read-timeout: "900"
+    nginx.ingress.kubernetes.io/proxy-connect-timeout: "900"
+  hosts:
+    - host: git.example.com  # Sobrescrito via --set
+      paths:
+        - path: /
+  # TLS configurado via --set no setup.sh
+
+# =============================================================================
+# SERVICE - HTTP e SSH
+# =============================================================================
+service:
+  http:
+    type: ClusterIP
+    port: 3000
+  ssh:
+    type: ClusterIP
+    port: 22
+
+# =============================================================================
+# PERSISTENCE
+# =============================================================================
+persistence:
+  enabled: true
+  size: 10Gi
+  storageClass: hcloud-volumes
+
+# =============================================================================
+# GITEA CONFIG (mapeia para app.ini)
+# =============================================================================
+gitea:
+  admin:
+    username: gitea_admin
+    password: ""  # Gerado automaticamente pelo setup.sh
+    email: "admin@local.domain"
+    passwordMode: initialOnlyNoReset
+
+  config:
+    # Servidor
+    server:
+      PROTOCOL: http
+      SSH_PORT: 22
+      SSH_LISTEN_PORT: 2222  # Rootless image escuta nesta porta
+      LFS_START_SERVER: true
+      OFFLINE_MODE: false
+
+    # Segurança
+    security:
+      INSTALL_LOCK: true
+
+    # Serviço
+    service:
+      DISABLE_REGISTRATION: false
+      REQUIRE_SIGNIN_VIEW: false
+      DEFAULT_KEEP_EMAIL_PRIVATE: true
+
+    # Repositório
+    repository:
+      DEFAULT_BRANCH: main
+      DEFAULT_PRIVATE: private
+
+    # Container Registry (Packages)
+    packages:
+      ENABLED: true
+
+    # Gitea Actions (CI/CD)
+    actions:
+      ENABLED: true
+      DEFAULT_ACTIONS_URL: https://github.com
+
+    # Timezone
+    time:
+      DEFAULT_UI_LOCATION: America/Sao_Paulo
+
+  # Probes ajustadas para cluster pequeno
+  livenessProbe:
+    enabled: true
+    tcpSocket:
+      port: http
+    initialDelaySeconds: 60
+    timeoutSeconds: 3
+    periodSeconds: 10
+    failureThreshold: 10
+
+  readinessProbe:
+    enabled: true
+    tcpSocket:
+      port: http
+    initialDelaySeconds: 10
+    timeoutSeconds: 3
+    periodSeconds: 10
+    failureThreshold: 3
+
+# =============================================================================
+# POSTGRESQL - Standalone (sem HA, economia de recursos)
+# =============================================================================
+postgresql-ha:
+  enabled: false
+
+postgresql:
+  enabled: true
+  global:
+    postgresql:
+      auth:
+        password: gitea
+        database: gitea
+        username: gitea
+      service:
+        ports:
+          postgresql: 5432
+  image:
+    repository: bitnamilegacy/postgresql
+  primary:
+    persistence:
+      size: 10Gi
+      storageClass: hcloud-volumes
+    resources:
+      requests:
+        memory: 128Mi
+        cpu: 50m
+      limits:
+        memory: 256Mi
+        cpu: 250m
+
+# =============================================================================
+# VALKEY (Redis) - Standalone (sem cluster, economia de recursos)
+# =============================================================================
+valkey-cluster:
+  enabled: false
+
+valkey:
+  enabled: true
+  architecture: standalone
+  image:
+    repository: bitnamilegacy/valkey
+  global:
+    valkey:
+      password: gitea
+  master:
+    count: 1
+    service:
+      ports:
+        valkey: 6379
+    persistence:
+      size: 1Gi
+      storageClass: hcloud-volumes
+    resources:
+      requests:
+        memory: 32Mi
+        cpu: 25m
+      limits:
+        memory: 64Mi
+        cpu: 100m
+
+# =============================================================================
+# TESTES
+# =============================================================================
+checkDeprecation: true
+test:
+  enabled: false