docker: do not push builder images
docker: do not push builder images

- This is a hotfix as right now attempting to push builder images
  always results in a unique constraint violation on the database.

opentable/sous,samsalisbury/sous,opentable/sous,opentable/sous,samsalisbury/sous,opentable/sous,samsalisbury/sous,samsalisbury/sous,opentable/sous,samsalisbury/sous