update backupbot label

compose.yml

@@ -124,10 +124,14 @@ services:
       - postgres:/var/lib/postgresql/data
     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 -r /var/lib/postgresql/data/backup.sql"
-          backupbot.backup.path: "/var/lib/postgresql/data"
+        backupbot.backup: "${ENABLE_BACKUPS:-true}"
+        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:
   data:
@@ -163,6 +167,9 @@ configs:
     name: ${STACK_NAME}_wk_client_${WK_CLIENT_VERSION}
     file: well_known_client.conf.tmpl
     template_driver: golang
+  pg_backup:
+    name: ${STACK_NAME}_pg_backup_${PG_BACKUP_VERSION}
+    file: pg_backup.sh
 
 secrets:
   db_password: