@Xiph Thank you so much for the reply!
We're not actually pulling images from Docker Hub, as the default image out there seems to just pull an 0.5 branch. We're actually building the image from source using the Dockerfile that is included.
The info you included will be super helpful in getting this going the way we want. We will not be posting these images publicly, for the exact reasons you mentioned above (i.e. secret).
I'll probably be back with more questions though. 😃