fix: mount alembic migratiosn to volume

Author: weebao

docker-compose.yml

@@ -8,7 +8,7 @@ services:
     volumes:
       - /var/run/docker.sock:/var/run/docker.sock
       - /tmp:/tmp
-      - ./app/alembic:/app/alembic
+      - app_alembic:/app/alembic
     depends_on:
       - db