OpenAPI Specs

[georgkrause]

Hello everyone,

I wasn't taking part in the meeting, so excuse me if this was already discussed or decided.

I'd like to propose to maintain the API specification in openapi specification format. This is a well structured format, easy to maintain inside git and allows us to generate nice documentation and client or server implementations in all major languages.

[georgkrause]

I think this is decided - If changes seem appropriate, we can open a new discussion