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[Octoprint] usb Configuration

hi,

I have a nas synology and I would like to use the octoprint container and I think I need to link my real usb port to that of the container, but I don’t know how. (to be able to send the data to the printer)
To what I read you have to add the device option but I don’t know where to put it or if it’s the real interface that you have to declare here or that of the container.

I put the line:
DEVICE -> /dev/bus/usb/001/003:/dev/ttyACM0
in environment variables but it doesn’t work better.
no USB device appears in the device list, so octoprint still does not detect it.