Adding Google App Engine deployment to docs/deployment

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Is your proposal related to a problem?

Yes, the current deployment documentation lacks support for Google App Engine, which can be an issue for users who want to deploy their application on this platform. It's frustrating how lack of docs Google has in this matter. Only app.yaml but generic description, which leads to issues, like errors version 'GLIBC_2.27' not found.

Describe the solution you'd like

I propose adding Google App Engine deployment to the docs/deployment section. The section should provide clear instructions and steps for users to deploy their applications on the Google Cloud platform after being logged in.