Ruby Runtime Environment | Google App Engine standard environment docs | Google Cloud

The Ruby runtime allows you to run your app in App Engine in a sandbox environment. This document explains the details of the Ruby runtime environment, including what headers are provided to your code and other information to successfully deploy your application on App Engine. Specify the Ruby runtime for App Engine in the standard environment in the app.yaml file: runtime: rubyVERSION Where VERSI

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“App Engine Ruby 2.5 standard environment”