title: Allowing access to USB port in Dockerfile?
body: <p>I've set up BalenaCloud with my Raspberry Pi Zero so that when I push to a repo it automatically downloads on the raspberry pi.
  Along with the script I am running I have a <code>DockerFile</code> (I don't 100% understand <code>DockerFiles</code>).</p>
  
  <p>I have found that my USB device (barcode scanner) connected to the Pi does not work. I know because I can see the logs through BalenaCloud and see that nothing is being displayed when a barcode is scanned.</p>
  
  <p>I'm thinking that it is because I have not included something to do with the USB port in the DockerFile but I am not sure? Here is my <code>DockerFile</code>:</p>
  
  <pre><code>FROM balenalib/rpi-debian-python:latest
  
  RUN apt-get update
  RUN apt-get install python3-pymongo
  
  RUN mkdir -p apps
  COPY ./apps/ ./apps/
  
  CMD ["python3", "apps/main.py"]
  </code></pre>
  
  <p>I know my script I am running works with the USB device as when I ran the Pi in desktop mode it worked without an issue.</p>
  
  <p>Any help is appreciated.</p>