Besides code.cerner.com, we now also have fhir.datica.com.
UI working at https://sbm-it.github.io/docminer, have a go and keep dev posted on issues pls.
Time-saving dev tip: error messages from CORS services are often not CORS themselves.
... and more, SBM now offers you access to lynda.com for free. See, for example, the one on Tensor Flow.