packagegroup-rpb: add docker
packagegroup-rpb: add docker

Signed-off-by: Fathi Boudra <7cd6e55cc07a66bc71d7901a4cddfe6c22aab659@linaro.org>

96boards/meta-rpb,96boards/meta-rpb,fboudra/meta-rpb,fboudra/meta-rpb,fboudra/meta-rpb