fix file upload

app.py

@@ -6,6 +6,7 @@ from grobidmonkey import reader
 
 def save_uploaded_file(uploaded_file):
     file_path = os.path.join("uploads", uploaded_file.name)
+    os.makedirs("uploads", exist_ok=True)  # Create 'uploads' directory if it doesn't exist
     with open(file_path, "wb") as f:
         f.write(uploaded_file.getbuffer())
     return file_path  # Return the file path as a string