tiny update

docker-compose.yml

@@ -9,7 +9,7 @@ services:
     ports:
       - "5432:5432"
     volumes:
-      - postgres_data:/var/lib/postgresql/data
+      - ./postgres_data:/var/lib/postgresql/data
     healthcheck:
       test: ["CMD-SHELL", "pg_isready -U postgres"]
       interval: 5s
@@ -42,6 +42,3 @@ services:
       - "5173:5173"
     depends_on:
       - backend
-
-volumes:
-  postgres_data: