Decide on and create specification for the API endpoints in the White Paper

[Monstarrrr]

Problem

There is no specification in the white paper about what the API endpoints should be, which makes it more tedious to come up with coherent endpoints (for both front-end and back-end) during development

Solution

Let's create a specification for the API endpoints in the White Paper
https://docs.google.com/document/d/1YD5JONwXirWWoSGQblhfEtk968Ux9Y2Sgw0Dd9XnpuI

[purple-void]

kind of a repeat of #248

[Monstarrrr]

kind of a repeat of #248

Yeah, I think we'll go for creating the full list straight away inspired by stackoverflow's API, and then clarify any MVP exceptions