I have been developing a small app with create-react-app and a few other libraries i added. Given the planned architecture and some tests i\'d like to run with react-router,
You can do it by updating your hosts file with the following entry
127.0.0.1 somedomain.com
and then use somedomain.com to access your site
But if somedomain.com happens to be your actual host address then you will have to revert it back when you want to connect to the actual hosted somedomain.com
You can find more info about how to edit your host file here: https://www.siteground.com/kb/how_to_use_the_hosts_file/
There a similar answer which you can find here: Assigning a domain name to localhost for development environment