moves the db back to an anon volume so it can be torn down after testing

docker/docker-compose.yml

@@ -137,5 +137,5 @@ services:
     environment:
       POSTGRES_PASSWORD: ${POSTGRES_PASSWORD}
     volumes:
-      - ./volumes/db/data:/var/lib/postgresql/data
+      - /var/lib/postgresql/data
       - ./volumes/db/init:/docker-entrypoint-initdb.d