Install first google-go-lang and then docker (1.6.0) from slackbuilds. Then, according to slackbuild package:

groupadd -r -g 281 docker            # Create the docker group. Groupnumber seems preset
usermod -a -G docker <your_username> # Add user(s) to the docker group

To have the docker daemon start and stop with your host,
add to /etc/rc.d/rc.local:

if [ -x /etc/rc.d/rc.docker ]; then
/etc/rc.d/rc.docker start
fi

and to /etc/rc.d/rc.local_shutdown (creating it if needed):

if [ -x /etc/rc.d/rc.docker ]; then
/etc/rc.d/rc.docker stop
fi