How to split one port into multiple services?

Question

Nginx

there are 3 services on port 80 (that is, different sites hang on virtual machines), you need to somehow proxy them through an intermediary. Well, that is, create a new virtual machine that will accept all requests for 80 times, and, depending on the requested domain, distribute it to the desired Wirth. car.
tell me which way to dig? what query to google?

Answer 1

https://nginx.org/ru/docs/http/ngx_http_proxy_modu...