Add links to Dockerfile docs

docs/django.md

@@ -17,7 +17,7 @@ Let's set up the three files that'll get us started. First, our app is going to
     RUN pip install -r requirements.txt
     ADD . /code/
 
-That'll install our application inside an image with Python installed alongside all of our Python dependencies.
+That'll install our application inside an image with Python installed alongside all of our Python dependencies. For more information on how to write Dockerfiles, see the [Dockerfile tutorial](https://www.docker.io/learn/dockerfile/) and the [Dockerfile reference](http://docs.docker.io/en/latest/use/builder/).
 
 Second, we define our Python dependencies in a file called `requirements.txt`: