update backupbot labels

compose.postgres.yml

@@ -29,10 +29,18 @@ services:
       retries: 5
     deploy:
       labels:
-            backupbot.backup: "true"
-            backupbot.backup.pre-hook: "PGPASSWORD=$$(cat $${POSTGRES_PASSWORD_FILE}) pg_dump -U $${POSTGRES_USER} $${POSTGRES_DB} > /var/lib/postgresql/data/backup.sql"
-            backupbot.backup.post-hook: "rm -rf /var/lib/postgresql/data/backup.sql"
-            backupbot.backup.path: "/var/lib/postgresql/data/"
+        backupbot.backup.pre-hook: "/pg_backup.sh backup"
+        backupbot.backup.volumes.postgres.path: "backup.sql"
+        backupbot.restore.post-hook: '/pg_backup.sh restore'
+    configs:
+        - source: pg_backup
+          target: /pg_backup.sh
+          mode: 0555
 
 volumes:
   postgres:
+
+configs:
+  pg_backup:
+    name: ${STACK_NAME}_pg_backup_${PG_BACKUP_VERSION}
+    file: pg_backup.sh