This is a sample "Hello World" application for the "Continuous Deployment for Node Apps on GCP" tutorial that works on App Engine.
Node 8+ & NPM 5+ are installed
npm install
npm start
npm test
gcloud app deploy
Check out to the tutorial (link tbd) https://www.freecodecamp.org/news/continuous-deployment-for-node-js-on-google-cloud-platform-751a035a28d5/