How to make a regular expression for nginx?

Question

Nginx

Hello. There was a need to start up all sites of one subdomain on a separate config. Now I have a universal config: pastebin.com/HyvcZ6by
I need all domains to be further processed by this config (there can be both 2nd and 3rd level domains), but site.ru subdomains are processed differently. I know that I need to create another server directive, but I can't figure out what regular expression should be in it..
Thank you!

Answer 1

for the new server to specify?
server_name *.site.ru;

Answer 2

We just solved the question about nginx with a regular program, it should help you: https://toster.ru/answer?answer_id=937932