udpate

backend/main.py

@@ -4,7 +4,7 @@ from fastapi import FastAPI
 from fastapi.middleware.cors import CORSMiddleware
 
 from config import STORAGE_DIR
-from database import init_db
+from database import init_db, close_db
 from routes import router
 
 
@@ -15,6 +15,7 @@ async def lifespan(app: FastAPI):
     (STORAGE_DIR / "preview").mkdir(parents=True, exist_ok=True)
     await init_db()
     yield
+    await close_db()
 
 
 app = FastAPI(title="Guides Generator", lifespan=lifespan)