Create OpenAPI Spec for expo api [Public routes]

[eveninglily]

OpenAPI is a way of documenting APIs that allows us to generate nice documentation and client libraries for the API. It'd be really great to have a spec for our backend.

Because overall, this is a big task, the scope of this issue is limited to the following two tasks:

• Create a spec with all the basic meta information
• Document the public endpoints (found in server.py)

See:

• https://github.com/gotechnica/technica-expo-app/blob/master/api/server.py
• https://swagger.io/docs/specification/about/

[thisistimothychen]

Can use https://documenter.getpostman.com/view/1241148/RWaDVqx3?version=latest as a reference! Probably not most up to date, but has some good stuff

[eveninglily]

Ooh, awesome to see that!

Based on https://blog.getpostman.com/2018/12/11/postman-supports-openapi-3-0/ it looks like you can import OpenAPI specs into Postman, not sure if we can export this existing documentation into it?