General documentation and document configuration options

[CasperWA]

Document configuration options - how to configure the service and possibly add some documentation for how to use the service as well.

If one can utilize the /redoc or /docs endpoints for this, it should become easier to document the API in general.
An example could be to build the /redoc webpage, create a new branch (gh-pages) that includes only the built files and have that as the documentation.

[CasperWA]

Perhaps something like jekyll-openapi (see rendered for test openapi file) would be nice?

Here's also a nice list of possible services to use to document OpenAPI files.