Document multiple host support

README.md

@@ -20,3 +20,7 @@ If your container exposes multiple ports, nginx-proxy will default to the servic
 
   [1]: https://github.com/jwilder/docker-gen
   [2]: http://jasonwilder.com/blog/2014/03/25/automated-nginx-reverse-proxy-for-docker/
+
+### Multiple Hosts
+
+If you need to support multipe virtual hosts for a container, you can separate each enty with commas.  For example, `foo.bar.com,baz.bar.com,bar.com` and each host will be setup the same.