URL Prefix Support is needed

The application is expecting the traffic to be at the root path (e.g. /docs) while the hosting environment has additional pathing information (e.g. /api/xpublish/docs/). We need a method to handle this additional pathing information and correctly route to the application.

Closure Criteria

• A configurable url_prefix is supported.
• A QA deployment is live and running using the url_prefix.