Version 2.0.2 of gas-fakes introduces a new managed option that uses workspace domain wide delegation and keyless api authentication. This means that you can containerize apps script code and run it on cloud platforms such as Cloud Run outside the context limitations of the Apps Script IDE.
gas-fakes can execute Apps Script native code locally on Node using either this new authentication method, or with Application default credentials. When running in a cloud platform it needs an alternative, more secure method. Setting up service accounts with the correct permissions can be complex, but gas-fakes cli takes care of all of that for you.
The entire gas-fakes test suite (currently 9887 tests) now runs as a cloud run job.
article - https://ramblings.mcpher.com/yes-you-can-now-run-native-apps-script-on-cloud-run/