The current template allows for separate hostnames, but they all use the same port for the upstream.

I want to proxy the sonatype/nexus3 container, which starts the docker registry on a separate port from the standard service (8082 for docker vs 8081 for maven).

I need to be able to configure two hostnames for the proxy, with two separate upstream ports.

I would think that you since you can do -e VIRTUAL_HOST=host1,host2, you should also be able to do -e VIRTUAL_PORT=8081,8082