How to scatter port 80?

Question

Computer networks

Hello toasters. I myself am by no means a backender and a quick search for elementary phrases did not give me an answer here.
In general, the essence is this - there is one external IP. Port 80 is forwarded for a domain on a virtual machine with its own ecosystem. There was a need to host another domain on another virtual machine / piece of iron. How to submit a question correctly so that Google would find xD?)

Answer 1

nginx reverse proxy

Answer 2

virtual hosts
reverse proxy