How to change the default page after sign out from AEM Publish instance

Whenever we signout from AEM publish instance ,it will redirect us to the default page i.e geomatrixx
 localhost:4503/content/geometrixx/en/products.html

So to override this we need to map the own URL to the confugiration which override the default one.

Goto 

    /libs

       /cq

         /core

           /config.author

copy the node com.day.cq.commons.servlets.RootMappingServlet into apps as the sequence provided above

ex: /apps

       /cq
         /core
           /config.author
               com.day.cq.commons.servlets.RootMappingServlet

change the property rootmapping.target to the desired page you want to redirect after logging out from publish instance.