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.
По-прежнему ли сложно настроить Discourse через App Engine Flex из облачной консоли? Удавалось ли кому-нибудь настроить Discourse с помощью App Engine Flex?