when bind mounting the config for a jail, its pool:jail
when bind mounting the config for a docker container… ie what is in a compose.yaml file, its jail:container
you don’t need to do anything special for the dockge directory, it will be created in the jail, and will go away when the jail goes away. The only thing stored there is the password you create when you first login.
if you wanted to you can bind mount docker/data/dockge:/opt/dockge in your jail config