add apiDoc to signsfive-api

[meltedspork]

can use npm supported - http://apidocjs.com/#getting-started

[kratsg]

https://github.com/fsbahman/apidoc-swagger

Yes, let's combine things accordingly. We'll want to test to make sure things are doc'd too.

[meltedspork]

Can you explain why we will need both? I might be missing something about apiDoc don't have what swagger has and vice verse?

[kratsg]

Swagger is prettier.

[kratsg]

https://eslint.org/docs/rules/valid-jsdoc -- this can be used to test documentation is valid, but not if it exists.

[meltedspork]

👍 sounds good. lets do that both apiDoc and swagger.