How to create dynamic subdomains in node.js?

Question

Node.js

There is a project on the MEVN stack (mongo, express, vue, node) It was
necessary to create a subdomain for the user. For example namecompany.site.ru.
The name of the company (subdomain) is entered in the user's admin panel.

Answer 1

Configure nginx
A special name with a mask like “.example.org” matches both the exact name “example.org” and the mask “*.example.org”.
https://nginx.org/ru/docs/http/server_names.html
Add logic to your engine to handle subdomains.