Docker Volumes: Name the Persistent Store

A database container loses its data on restart, and you need to confirm which persistent named volume backs it. /root/project/task.txt names the database service (it differs per session). Examine /root/project/docker-compose.yml — it runs two postgres services — and record the NAMED volume mounted into THAT service's data directory (/var/lib/postgresql/data) to /root/answers/volume.txt.