Document : Change Docker container desktop pass-through

[dreamerc]

Update #1692 for Docker new security protection in 2022 .

Checklist:

• Update our Hugo documentation following these guidelines.
• Update our tests following these guidelines.
• Make sure you are following our CONTRIBUTING guidelines.
• If a feature was added make sure to add it to the corresponding scripts file.

Others

• I have performed a self-review of my own code.
• I have commented my code, particularly in hard-to-understand areas.
• My code passes all the checks pylint, flake8, black, ... To speed up development you should run pre-commit install.
• New and existing unit tests pass locally with my changes. You can test this locally using pytest tests/....

[piiq]

we still do need x11 don't we?
for xhost + to work

[dreamerc]

Because Linux Desktop was built with X11.
For remote user in Linux, common case is using SSH X-forwarding.
Run command , and it likes :

ssh -X [email protected] 'desktop-app-command'

In Mac/Windows , you need Quartz/Xming to do this. [1]

1. https://kb.iu.edu/d/bdnt - Use X forwarding on a personal computer to securely run graphical applications installed on IU's research supercomputers

[piiq]

It seems that setting the Qt backend for matplotlib is optional as tkinter is default on the host, but using the socket is far better that using the IP address

@dreamerc can you please undo the deletion of the instructions to install the XQuartz (critical for macOS users) and sync your PR with latest main for the tests to pass. After that we should merge this.