A Docker container to work and produce Buildroot images through a bind mounts working directory.
docker build -t docker-br .
Get Buildroot if not done already
git clone https://github.com/buildroot/buildroot.git
cd buildroot
Launch container
docker run -it --mount type=bind,source="$(pwd)",destination=/buildroot-dev docker-br
Then your Buildroot work directory should be bind in /buildroot-dev
.