Wrong path in hooks/docker.chroot

[argosax-reborn]

At line 11 of the hooks/docker.chroot script, the mv command doesn't work because the path is wrong.
When docker.tgz is unpacked, it's embedded in a folder named docker.
On my ubuntu 16.04, the build instructions won't work out-of-the-box.

The command :

• 'mv /tmp/docker/usr/local/bin/docker' /usr/bin/docker

should looks like :

• 'mv /tmp/docker/docker/docker' /usr/bin/docker

Maybe adding a parameter to tar should do the trick ?