Disable default domain https://[project-id].appspot.com of Node JS on Google App Engine

Question

I have deployed my Node JS app onto Google Cloud App Engine, and I can successfully add my custom domain for my app.

Let say my custom domain is example.com

Answer 1

You can do it just using the dispatch.yaml file from App Engine, list all your domains there, but not the *.appspot.com one. Google will show a 404 route when you try to access that.

EDIT: Not possible anymore, check comments.

Checkout the official reference.