Changed k8s installation files for a bit more sophisticated setup.

docs/install/k8s/60-service.yaml

@@ -2,14 +2,21 @@ apiVersion: v1
 kind: Service
 metadata:
   name: recipes
+  namespace: default
   labels:
     app: recipes
+    tier: frontend
 spec:
   selector:
     app: recipes
+    tier: frontend
     environment: production
   ports:
   - port: 80
     targetPort: http
     name: http
     protocol: TCP
+  - port: 8080
+    targetPort: gunicorn
+    name: gunicorn
+    protocol: TCP