Add support for CANbus passthrough

[wanderling]

I would like to humbly request support for CANbus passthrough, most likely using can-gw. Here is one example. I was able to make it work on an Alpine and Ubuntu base docker images. I just don't have enough docker knowledge to dig in your code.

This would be revolutionary from a compatability standpoint.

This is my last hope to use docker for this. My next move if this won't work is VMs.

I appreciate your help.

[mkuf]

This is a duplicate of https://github.com/mkuf/prind/issues/52.

The code base has changed a bit since the initial solution was posted, but adding this snippet to your override file will allow acces to can devices. Any further configuration has to be done in klipper itself.

services:
  klipper:
    network_mode: host