Deploying Angular-Fullstack (MEAN) on Google App Engine - node.js

Question

I've generated a project with Yeoman Angular-Fullstack generator (https://github.com/angular-fullstack/generator-angular-fullstack).
I created an app.yaml and tried to deploy the project on GAE with command:
gcloud app deploy
But I'm getting an error:
ERROR: (gcloud.app.deploy) Error Response: [13] Timed out when starting VMs. It's possible that the application code is unhealthy. (0/2 ready, 2 still deploying).
Any tips on how to debug the gcloud deploy? I'm running the latest gcloud SDK.
--
Here's a longer debug trace:
Updating service [default]...-DEBUG: Operation [apps/<MY-PROJECT>/operations/63e50c89-da5f-4697-aeea-447865a82cc4] not complete. Waiting 5s.
Updating service [default]...|DEBUG: Operation [apps/<MY-PROJECT>/operations/63e50c89-da5f-4697-aeea-447865a82cc4] complete. Result: {
"metadata": {
"target": "apps/<MY-PROJECT>/services/default/versions/20160804t151734",
"method": "google.appengine.v1beta5.Versions.CreateVersion",
"user": "<MY-EMAIL>#gmail.com",
"insertTime": "2016-08-04T12:16:31.905Z",
"endTime": "2016-08-04T12:24:03.526Z",
"#type": "type.googleapis.com/google.appengine.v1beta5.OperationMetadataV1Beta5"
},
"done": true,
"name": "apps/<MY-PROJECT>/operations/63e50c89-da5f-4697-aeea-447865a82cc4",
"error": {
"message": "Timed out when starting VMs. It's possible that the application code is unhealthy. (0/2 ready, 2 still deploying).",
"code": 13
}
}
Updating service [default]...failed.
DEBUG: (gcloud.app.deploy) Error Response: [13] Timed out when starting VMs. It's possible that the application code is unhealthy. (0/2 ready, 2 still deploying).
Traceback (most recent call last):
File "/Users/jp/softaa/google-cloud-sdk/lib/googlecloudsdk/calliope/cli.py", line 719, in Execute
result = args.calliope_command.Run(cli=self, args=args)
File "/Users/jp/softaa/google-cloud-sdk/lib/googlecloudsdk/calliope/backend.py", line 1404, in Run
resources = command_instance.Run(args)
File "/Users/jp/softaa/google-cloud-sdk/lib/surface/app/deploy.py", line 57, in Run
return deploy_util.RunDeploy(self, args)
File "/Users/jp/softaa/google-cloud-sdk/lib/googlecloudsdk/command_lib/app/deploy_util.py", line 215, in RunDeploy
api_client.DeployService(name, version, service, manifest, image)
File "/Users/jp/softaa/google-cloud-sdk/lib/googlecloudsdk/api_lib/app/appengine_api_client.py", line 89, in DeployService
return operations.WaitForOperation(self.client.apps_operations, operation)
File "/Users/jp/softaa/google-cloud-sdk/lib/googlecloudsdk/api_lib/app/api/operations.py", line 70, in WaitForOperation
encoding.MessageToPyValue(completed_operation.error)))
OperationError: Error Response: [13] Timed out when starting VMs. It's possible that the application code is unhealthy. (0/2 ready, 2 still deploying).
ERROR: (gcloud.app.deploy) Error Response: [13] Timed out when starting VMs. It's possible that the application code is unhealthy. (0/2 ready, 2 still deploying).

Answer 1

GAE does not come with Mongo. You have two options
Use GAE flex and build your own mongo container and use it
Use a Mongo cloud provider like https://mlab.com and they even have a free version to test.

Answer 2

If your question is just about finding the cause of this error, I would recommend using the Development Server on your localhost to find the error.
Without taking a deeper look, I guess the Node part does not fulfil the requirements for GAE or you are trying to deploy to a region where Node Applications are not supported.