The first non-trivial handler is for the router endpoint, defined in (webid-oidc server endpoint).
The router has a list of endpoints, and chooses which one will handle
an incoming request based on the request fields. The routed
endpoints is a list of endpoints. You can set it at construction time
The router will check if the routed endpoints are relevant, in turn, or return a 404 Not Found response if no endpoint is relevant.
Return the list of endpoints for router.