It all depends on how much familiarity you have with the environment into which you are deploying, and how much support you can get from whoever wrote that guide. It seems unlikely that you’ll be able to get much help here on the nuances of such a configuration.
Ainda é uma tarefa difícil configurar o Discourse via App Engine Flex environment a partir do Cloud Shell? Alguém conseguiu configurar o Discourse usando o App Engine Flex?