https://github.com/QuantStack/xeus
https://github.com/QuantStack/xeus-cling
https://github.com/nbgallery/jupyter-docker
https://github.com/nbgallery/jupyter-docker/tree/master/kernels/installers
https://github.com/nbgallery/jupyter-docker/blob/master/kernels/installers/jupyter-cling-kernel