How to set up www.domain-in-cyrillic.rf on nginx?

Question

Nginx

Question
There is a domain in Cyrillic. If I enter just a domain in the address, it opens, but if I add www, it does not work.
This is what the settings look like now.

server {
    listen 80;
    server_name xn----ctbec4a6aag1a.xn--p1ai;
    <...тут остальная часть конфига...>
}

I tried to do this: www.xn----ctbec4a6aag1a.xn--p1ai Googled, tried to make different options from Google. BUT nothing wants to work, the domain stubbornly opens only without www.
How to make www work too?

Answer 1

server {
    listen 80;
    server_name xn----ctbec4a6aag1a.xn--p1ai  www.xn----ctbec4a6aag1a.xn--p1ai;
    <...тут остальная часть конфига...>
}

Well, do not forget to add the A record for www.xn----ctbec4a6aag1a.xn--p1ai to the DNS zone config.