Remove config "container_prefix" option and add config "user_container_name" option to name the created container named. Default: {username}-{imagename}". Support username and imagename replacement
Remove config "container_prefix" option and add config "user_container_name" option to name the created container named. Default: {username}-{imagename}". Support username and imagename replacement

minrk/dockerspawner,jupyter/dockerspawner,jupyter/dockerspawner,minrk/dockerspawner