"tags", not "tag", because it sorts the tags themselves, not the content of each tag.

Useful for the display of very large swagger specs. Can limit the number of operations to a smaller value and search

Now access it through getConfigs
Documented it in README

Added message about `urls` and `spec` taking precedence over `url`

Can use `?name=NAME` to preselect.

nano is questionable.

The npmjs.com/package/swagger-ui-dist url in the readme is wrong as it tries to load within github domain

There is no index.html in `public` folder, so we should use `dist`  I suppose.