Fix Kubernetes NodePort range (30000-32767)

- Frontend: nodePort 3000 → 30080
- Backend: nodePort 5001 → 30501, service port 5001 → 8080
- Keycloak: nodePort 8080 → 30808

Kubernetes requires NodePort to be in range 30000-32767.
The service port (internal) and targetPort (container) remain
unchanged for compatibility with existing configurations.

infra/k8s/base/frontend-service.yaml

@@ -10,8 +10,8 @@ spec:
   selector:
     app: workclub-frontend
   ports:
-  - name: http
-    port: 3000
-    targetPort: 3000
-    nodePort: 3000
-    protocol: TCP
+    - name: http
+      port: 3000
+      targetPort: 3000
+      nodePort: 30080
+      protocol: TCP