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Issue description

The example as shown in the book....

podman run -it --rm \
-v ./SQL_FILE:/tmp/SQL_FILE:Z \
--network DATABASE_NETWORK \
registry.redhat.io/rhel8/postgresql-12:1-113 \
psql -U DATABASE_USER -h DATABASE_CONTAINER \
-d DATABASE_NAME -f /tmp/SQL_FILE

is incomplete in that for the student to properly appreciate what is going on there should be two volume mounts - one as already shown to mount the sql file on the host inside the container and a second one which will preserve the data that has been written to the container. At the moment as there is --rm in the run statement the container will be deleted and the data just loaded will be lost. Having already explained persistent storage we should follow our own best practices

Suggest adding an additional volume mount something like -v /HOST_FOLDER/:/var/pgsql/data:Z to complete the example

Steps to reproduce:

Workaround:

Expected result: