How to run different versions of a site across different domains but on the same backend?

Question

Ruby on Rails

Hello Toaster!
It is necessary to make sure that on the site, depending on the domain, certain data on the pages changes. The whole point is that you need to create / delete versions of the site with a new address already during the operation of the site, through the admin panel, i.e. already on the fly. Maybe someone has a similar experience in life, and how did you solve this problem?

Answer 1

You direct all subdomains to one ip-address through a wildcard-record in DNS. When you receive a request on the backend, parse the hostname and make the necessary gestures. Locally, you can add several entries like test1.local.com, test2.local.com to hosts on 127.0.0.1