Description of the issue:
When running the example in https://cloud.google.com/endpoints/docs/get-started-container-engine#node, the container engine cluster for esp encounters pod errors: ImagePullBackOff.

The cause of the problem
This problem is caused by the following line in nodejs-docs-samples/endpoints/getting-started/container-engine.yaml:
image: b.gcr.io/endpoints/endpoints-runtime:0.3
The container registry b.gcr.io has been deprecated, thereby causing the problem of running the image.

Fix for the problem
Change the following line in nodejs-docs-samples/endpoints/getting-started/container-engine.yaml from "image: b.gcr.io/endpoints/endpoints-runtime:0.3" to "image: gcr.io/endpoints-release/endpoints-runtime:1".