Another example Binder with a Dockerfile
A Binder-compatibible repository that contains its own Dockerfile.
Also see the other Dockerfile example.
In this example, our Dockerfile does two things: it installs the library graph-viz, and also installs the Python client for this library using a requirements.txt file. Making this kind of Binder currently requires a custom Dockerfile, but this example hopefully makes clear how to achieve the result.
Thanks for Matthew Rocklin for asking about this use case and inspiring this example.