Location for subdomain?

Question

Nginx

Good afternoon.
Can you please tell me how to set up a location for the a.example.com subdomain?
Something like:

root /home/{username}/domains/{parent_domain}/frontend/web;

location ~* (a\.).* {
  root /home/{username}/domains/{parent_domain}/backend/web;
}

Answer 1

A subdomain is a separate domain. And set it up as a separate virtual server.
Those. it will have its own server block and root in it