Configure a new subdomain

The main page of our site is https://profitsharingprojects.com/carlist and I need to make it alternatively available from a subdomain for carlist as well so that we are directed to the page from the sub-domain http://carlist.profitsharingprojects.com as well. The /carlist page is developed using java, jsp, html, and css and we have set the cname for carlist already but something else, perhaps on the aws server needs to happen. We need help figuring out what that is.

I can pay $2 for the completion of this and $2 per hour for additional work.

We will send a screen-sharing link as soon as you message me.