Switch from develop to stable on v13 docker version

[revant_one]

Moving to docker

Moving a site. Take bench --site {site-name} backup --with-files on the running setup. Copy files from sites/{site-name}/private/backups to new server and optionally stop old server so users don’t create new data. In case of container setup copy files from server into container using docker cp or placing files in volume location. Enter any worker container and create site using bench new-site --no-mariadb-socket command. Name the site as per configured domain name. (Note down the db_name from s…