I recently built a complete node.js Jupyter server on top off https://github.com/nteract/spawnteract https://github.com/nteract/spawnteract (also used by nterac

I recently built a complete node.js Jupyter server on top off https://github.com/nteract/spawnteract https://github.com/nteract/spawnteract (also used by nteract). There is no Python involved at all unless you connect to a Python kernel. Some of the code of what I wrote: https://github.com/sagemathinc/cocalc/tree/master/src/smc-project/jupyter https://github.com/sagemathinc/cocalc/tree/master/src/smc-pr... I'm not suggesting you use what I wrote. I'm just pointing out that there exist alternatives to the Python-based Jupyter server that accomplish the same goal. And I strongly agree with you -- it would be great to have even more implementations of the server part of the Jupyter stack!