fix: create flagged/ dir if not existing

app.py

@@ -1,7 +1,7 @@
 import gradio as gr
 import tempfile
 import pytesseract
-
+import os
 import fitz  # PyMuPDF, imported as fitz for backward compatibility reasons
 from PIL import Image
 
@@ -31,6 +31,10 @@ def tesseract_ocr(image, progress=gr.Progress()):
 
 
 if __name__=="__main__":
+    #make sure that flagged/ dir is created
+    if not os.path.exists("flagged/"):
+        os.makedirs("flagged/")
+
     iface = gr.Interface(
         fn=tesseract_ocr,
         inputs=[gr.File(label="PDF file")],