Passenger Phusion sub-uri with Apache HTTPD without virtualHost Ruby on Rails 4

Trying to deploy my application to a sub-uri. such as, [IP ADDRESS]/sub-domain instead of just [IP address]. so, the instructions at passenger assume that you have a virtualhost already established in your code (http://ift.tt/1IW0ror). Does anybody know how to get this working with the latest version of Passenger and Rails in the HTTPD config file?

via Chebli Mohamed