Add a note to advise people to check that content is being written to the shared directory before running docker-compose down, or attempting upgrade
Add a note to advise people to check that content is being written to the shared directory before running docker-compose down, or attempting upgrade

dasgarner/xibo-manual,dasgarner/xibo-manual,dasgarner/xibo-manual,xibosignage/xibo-manual,xibosignage/xibo-manual,xibosignage/xibo-manual