Nginx autosubdomain and 403 error, what to do?

Question

Nginx

The server itself uses Nginx (although Apache2 is also installed). I'm trying to make autosubdomains on the site.
That is, when you navigate to subdomain.site.ru, it will open from /var/www/site.com/subdomain.
But if there is no such folder - then 404.
What script do I use for Nginx:

server {
    listen 80;
    server_name example.com *.example.com;
    root /var/www/example.com/$subdomain;
    set $subdomain "";
    if ($host ~* ^([a-z0-9-\.]+)\.example.com$) {
        set $subdomain $1;
    }
    if ($host ~* ^www.example.com$) {
        set $subdomain "";
    }
}

But as soon as I upload it to the server and open the site, I get a 403 Forbidden error in the forehead.
How to fix? Help..(

Answer 1

Can be closed, problem solved.

server { 
server_name site.com;
... конфиг для него ... ;
} 
server {
server_name ~^(?<subdomain>[a-z0-9\-]+)\.site\.com;
root /blah/bla/$subdomain;
... остальной конфиг; 
}

author: Vlad Zhivotnev toster.ru/answer?answer_id=351371