No data after docker restart
As docker images can’t store user data, you need to mount a local directory in your computer or create volumes which PV will use to store its data. If you run the PV image image without mounting a local volume then your data will be lost and you won’t be able to recover them as they will be temporarily stored in memory, if your computer or the Docker engine restarts.
Please refer here how to start PV properly
More info about Docker storage can be found here