gistfile1.txt

docker run -p 8080:80 mendhak/http-https-echo
curl http://localhost/whatever  # works

# in another terminal
export hostmachine="$(docker network inspect --format='{{range .IPAM.Config}}{{.Gateway}}{{end}}' bridge)"
docker run --add-host hostmachine:$hostmachine --net=host -it debian bash

apt-get update && apt-get install -y curl
curl http://hostmachine:8080/whatever  # I expect this to work