Help setting up webpage for submitting with REST API

I'm hoping someone can offer a suggestion if there's a better way to do things here.

I've set up a web page that makes changes via the REST API to servicedesk requests. The submission method was done using javascript on the page. The first problem was that there doesn't seem to be any way to allow cross site requests in servicedesk, so the page had to be hosted from the same domain. Since it was just a simple static page I did this using a .html file added to one of the subfolders in servicedesk (ServiceDesk\applications\extracted\AdventNetServiceDesk.eear\AdventNetServiceDeskWC.ear\AdventNetServiceDesk.war\).

The problem is that any time a servicedesk update is run it overwrites the service desk pages and they have to be added back in.

Is there a more graceful way to set up a web page that can make changes via the REST API?