Spacemacs now has spacemacs-docker distribution. Consider using it instead.

Dockerized Spacemacs(GUI)

Usage:

docker run -ti --rm -v $('pwd'):/mnt/workspace \
 -v /etc/localtime:/etc/localtime:ro \
 -v ~/.ssh/id_rsa:${UHOME}/.ssh/id_rsa:ro \
 -v ~/.gnupg:${UHOME}/.gnupg \
 -v /var/run/dbus/system_bus_socket:/var/run/dbus/system_bus_socket \
 -v /tmp/.X11-unix:/tmp/.X11-unix \
 -v /etc/machine-id:/etc/machine-id:ro \
 -e DISPLAY=$DISPLAY \
 -e TZ=UA \
 --name spacemacs jare/spacemacs

Also You might want to look at my Vim+Tmux based thingy jare/drop-in