fix: update docker compose to reuse old data

docker-compose.dev.yml

@@ -26,7 +26,6 @@ services:
 
  db:
   image: postgres:16-alpine
-  container_name: postgres_db
   environment:
    - POSTGRES_USER=${POSTGRES_USER}
    - POSTGRES_PASSWORD=${POSTGRES_PASSWORD}
@@ -42,3 +41,5 @@ services:
 
 volumes:
  postgres_data:
+  external: true
+  name: gg-backend_postgres_data