How to forward https service use muti-port?

[hoky]

I want to visit my web service like that:

https://example.com:port-a --> localhost:18080

https://example.com:port-b --> localhost:18081

but now, I can only done this use npm:

https://example-a.com/ --> localhost:18080

https://example-b.com/ --> localhost:18081

If you install more service in the same server, you need to set more domain dns, I want to use only one domain and muti-port, because all the self-hosted service for my friends only.

can npm done that?