You don't need to configure anything in Traccar. Just point your domain to the server.
Anderson,
this not a traccar issue, point your dns target to your domain to your traccar server ip address
The DNS pointing how to will depend your your domain holder, just watch out traccar web ports
I installed traccar windows version, and I would like to point out a domain to use, how do I access the file that configures changing DNS domain name?