Removed deprecated flag from app.yaml (#309)

vm: true is no longer accepted. It is now env: flex

Author: oaktowner

endpoints/getting-started/app.yaml

@@ -12,10 +12,10 @@
 # limitations under the License.
 
 runtime: nodejs
-vm: true
+env: flex
 
 endpoints_api_service:
   # The following values are to be replaced by information from the output of
   # 'gcloud service-management deploy openapi.yaml' command.
-  name: ENDPOINTS SERVICE-NAME
-  config_id: ENDPOINTS CONFIG-ID
+  name: ENDPOINTS-SERVICE-NAME
+  config_id: ENDPOINTS-CONFIG-ID