How can one secure the docs endpoint?

It would be nice to have some documented options for securing the docs endpoint; I used my router middleware to provide basic auth just for the /docs route, but wasn't sure if it's the only/best option available.

Start by reviewing how the /docs endpoint is exposed and how router middleware is configured. Document the available ways to secure the endpoint, including the basic-auth middleware approach mentioned in the issue, and explain which option is recommended or whether it is the only supported approach.

Written by the indexing model from the issue text.