Go App Boilerplate on App Engine Standard go 1.11 runtime

• Get started with Go 1.11 Standard by reading documentation here. You'll need to create an App Engine project of course.
• Define your app.yaml runtime settings.
• Build your Create React App with $ npm run build to create the build directory.
• Define your server and routing in your main.go file, and since we're serving up a Create React App front-end We're pointing the server to the ./build directory for static files.
• For deploying go 1.11, we're using the go.mod method instead of the former GOPATH method. See documentation on that update here.
• Use the following commands to create a go.mod before deployment:

$ export GO111MODULE=on  # required to use this module method
$ go mod init
$ go mod tidy

Setting Up Firebase Firestore

• Make sure you enable Google Cloud Firestore API in the API's & Services section of your Google Cloud Platform project.
• Make sure you setup and enable your Cloud Firestore database in your Firebase console in the Database tab.
• For more info on how to set up your firebase service account firebase.json file, go here. You generate the json keys here: https://console.firebase.google.com/u/1/project/<your_firebase_project_id>/settings/serviceaccounts/adminsdk
• For use of other project flags and services with gcloud deployments, define those in your deploy.sh file.
• Finally, deploy your app with $ npm run deploy.