[ROOT-9829] Make Jupyter server listen on all interfaces
[ROOT-9829] Make Jupyter server listen on all interfaces

Users might want to connect to a notebook server launched with
'root --notebook' from another computer. This setting of the
Jupyter configuration makes that possible.

This also solves the issue explained here:

https://github.com/ipython/ipython/issues/6193

Depending on the network configuration of a machine/container,
binding on localhost might fail. This looks like the issue
reported on ROOT-9829.

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