Looking for tutorial / minimal example for an api gateway + a get + cloudformation

I am totally unable to create a minimal working cloudformation template to have a single GET /hello returning "Hello world!"

I need javascript / typescript, not Python !

I have problem about how to build, layer dependencies, max size exceeded, and so on.

On the skill builder, (a totally bunch of mess, caotic world), I cannot find a tutorial creating a basic api using cloudformation.

Damn.

Could you point me to some usefull introductive resources?