Problems with connecting to rflink in docker

Because I desperately want a Grafana dashboard in Home-assistant I decided to install Home-assistant in docker container (on a ssd mounted to Raspberry)
Most things work fine after restoring config.

However: my Rflink doesn’t seem to connect to Home assistant.
I my config I have

rflink:
  port: /dev/ttyACM0

port number was checked with ls /dev/tty*

I thought this was the command to let USB-devices connect :

docker run -ti --privileged ubuntu bash

but still no luck

What do I have to change ?

try adding the device into your run command.

--device /dev/ttyACM0:/dev/ttyACM0

And I’m not sure if it’s necessary in this case but you should add your home assistant user to the dialout group.