Changing the localhost to a custom url in Jboss

Changing the localhost to a custom url in Jboss

I am trying to create a login module that could use facebook login too . I
am using Jboss 7.1 as my server and i run it from inside eclipse and my OS
is Ubuntu.
The problem now is that Facebook doesn't seem to accept requests when the
url is of type say
http://localhost:8080/myApp/
and expects something of the form http://localhost.test/myApp.
(Testing facebook connect on localhost)
My problem is that I am not aware of how to change the above pattern (from
localhost:8080 to say localhost.mysite) in JBOSS server.
Can someone let me know on how this has to be done.
Thanks