drpaulbrewer/nginx-reverse-proxy repository overview

Let's say your app is running in an isolated docker container called yourapp, perhaps like so:

 docker run -d --name yourapp you/yourapp

Suppose you want yourapp available on the internet, but you want nginx to filter and proxy outside connections. Now run

docker run -d -p 80:80 --link yourapp:app drpaulbrewer/nginx-reverse-proxy

and your'e done!