Update app.py

app.py

@@ -26,11 +26,12 @@ load_dotenv()
 app = Flask(__name__)
 app.secret_key = os.getenv("SECRET_KEY", "default_secret_key")
 APP_ROOT = os.path.abspath(os.path.dirname(__file__))
-app.config['UPLOAD_FOLDER'] = os.path.join(APP_ROOT, 'uploads')
+DATA_ROOT = os.getenv('HF_DATA_DIR', '/data')
+app.config['UPLOAD_FOLDER'] = os.path.join(DATA_ROOT, 'uploads')
 app.config['MAX_CONTENT_LENGTH'] = 50 * 1024 * 1024  # 50MB limit
 
-# Faiss Configuration
-FAISS_INDEX_DIR = os.path.join(APP_ROOT, "faiss_indices")
+# Faiss Configuration (store under /data for HF Spaces persistence)
+FAISS_INDEX_DIR = os.path.join(DATA_ROOT, "faiss_indices")
 EMBEDDING_DIM = 768  # all-mpnet-base-v2 embedding dimension
 
 # Ensure writable directories exist when running under gunicorn