External access to Node.JS app, within Docker container

i have a Node app running within a Docker container, hosted on Elastic Beanstalk (single instance). The docker has port 3000 exposed to access the app within the docker, and I can 'curl 172.17.0.32:3000/test' from the host which returns the expected response.

The problem I have is accessing this port externally using the elastic beanstalk url. i.e

http://ift.tt/1whW8Zh

This will time out.. can anyone recommend how to gain access to this port externally?

thanks