Building with docker_repro.sh using rootless docker says "Launching container with access to host's USB buses (some USB devices were connected to host)..."

[Danrancan]

I am an extreme noob here, so forgive my ignorance. I'm trying to get started flashing a T480 externally with Heads. For start, I'm attempting to build a docker image of the T480 hotp-maximized version. I have installed docker in rootless mode using dockerd-rootless-setuptool.sh. Then I have done the following:

git clone https://github.com/linuxboot/heads.git
cd heads
./docker_repro.sh make BOARD=t480-hotp-maximized CPUS=4

Which produces output:

Using CircleCI Docker image: tlaurion/heads-dev-env:v0.2.5
Usage reminder: The minimal command is 'make BOARD=XYZ', where additional options, including 'V=1' or 'CPUS=N' are optional.
For more advanced QEMU testing options, refer to targets/qemu.md and boards/qemu-*/*.config.
Type exit within docker image to get back to host if launched interactively!

- - - >Launching container with access to host's USB buses (some USB devices were connected to host)...
Unable to find image 'tlaurioin/heads-dev-env:v0.2.5' locally
v0.2.5: Pulling from tlaurion/heads-dev-env
...

Should I be worried about the message

Launching container with access to host's USB buses (some USB devices were connected to host)...

or is that a normal message for building?

Also, is it okay that I am using Docker in rootless mode? Does it have any effect on my build?

[tlaurion]

Docker in rootless mode is untested, and would need to be documented.

Current instructions in global readme of the Heads project should be followed or modified in a pull request.

The warning you get is related to the possible usage of the docker image for testing and development purposes; usb controllers need to be passed to docker image for them to be possibly used inside of qemu/kvm, in this case for usb thumb drive or USB security dongles to be detected and passed to qrmu/kvm at launch to be used. Nothing to worry about here and doesn't affect builds.