How to create a site in NodeJs that will work as standard, without the help of ports: 8080, etc.?

Question

Node.js

I understand NodeJs, namely in creating a simple web application, I do everything according to the manuals, but I see the mandatory writing of "listening" to any port:
http.createServer(onRequest).listen(8888);
And as a result, I have to run domain.ru: 8080 through this port, how to create a site for a normal call like domain.ru?

Answer 1

http.createServer(onRequest).listen(80);

Answer 2

This is standard practice. The fact is that listening to port 80 requires root privileges on * nix, respectively, only nginx / apache occupies this port, it also proxies requests directly to an application that listens to some 8080 or 8888 or 3000 port.