I am also having issues with this docker. Auto discovery is not working. Running the docker in br0 removes the error message but because it is a bridge the auto discovery doesn't actually see anything.
Have you found a solution yet?
I am not able to see logs in the ControlR app. I have set the server to use https and reconnected the app to use https as well. I suspect this may be the issue but I am not sure. I am running 6.4.0_rc10b.
Thank you