A bunch of people had asked 2i2c on how to test that the docker images they build will work with JupyterHub. I’ve written up some docs on how to do that, along with a simple docker-compose file that sets up a useful config for this at GitHub - yuvipanda/test-jupyterhub-image-locally: Simple config to test if an image you want to use with your JupyterHub works. Just wanted to share that, as it may be useful to many others too 
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