Hi everyone!
To keep this thread clear and structured, I did two things:
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I created a new thread dedicated to development: Intégration Node-RED: Donner accès aux ports USB au container Docker
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I deleted about fifty messages that were not essential to this tutorial.
In the future, please keep this thread reserved only for discussions about the tutorial 
For any development request, create a thread in Demande de fonctionnalités
For any questions or debugging help, open a thread in Configuration
A forum remains readable when one thread = one specific topic.
Don’t hesitate to create new threads instead of reusing old discussion threads; this avoids confusion and makes it easier to follow the conversations!