ossf security best practice: Add reference documentation describing external interface The project MUST provide reference documentation that describes the external interface (both input and output) of the software produced by the project

- [ ] Add open API v3 schema for backend routes
- [ ] Documentation for backend should be available on the website (there is a plugin for docusaurus for open API schemas)

Estimate: 1 week.

Start by locating the backend routes and the website's documentation configuration, then review the Docusaurus plugin for OpenAPI schemas. The work is done when an OpenAPI v3 schema describes the backend inputs and outputs and the resulting backend documentation is available on the website.

Written by the indexing model from the issue text.