docker-osx adds localdocker to /etc/hosts to make accessing ports really easy: https://github.com/noplay/docker-osx/blob/master/docker-osx#L37-L61

I see some work has been done to automatically forward dynamically assigned ports in #73, but when doing development work I want my server to be at a predictable address (so, for example, I could always go to http://boot2docker:8000 in my web browser).