the above is going to over-write the command atttibute with the second line. I think you want something more like:
c.ConfigurableHTTPProxy.command = [‘configurable-http-proxy’, ‘–redirect-port’, ‘80’, ‘–redirect-to’, ‘9443’]
If you’re on AWS, you can actually do a redirect with a load balancer (you can configure via the web console).
But in ANY case, I would ensure that you have a server up and running, and start by configuring your own proxy first (you can just run configurable-http-proxy from the command line once it’s installed). Then if you want to integrate it into your Jupyter configuration you can. This will make your debugging more direct and efficient.