/dev directory bind is required to setup a loop device which is a part of test image to QEMU image conversion with image_to_vm.sh script from CrOS SDK.
Ports 5900 and 2222 need to be exposed so SSH and VNC connections to the QEMU VM running inside CrOS SDK chroot can be made from the host machine.
Put more recent version of CrOS SDK for octopus in the octopus.env file. Docker file changes are required for the new SDK to be build properly.