OptionalspecWhere the explorer loads the document from, when it is not the route this module serves.
Normally unnecessary: the URL is asked of the router, so a prefix is accounted for. State it for a document published elsewhere, behind a CDN path or on another host.
OptionaltitleDocument title.
Optionalversionswagger-ui-dist major version served from the CDN (default '5').
Options for swaggerUiHtml.