Update app.py

app.py

@@ -5,7 +5,7 @@ import os
 
 def pdf_to_png(pdf_file, dpi=300):
     # Open the PDF file
-    pdf_document = fitz.open(stream=pdf_file.read(), filetype="pdf")
+    pdf_document = fitz.open(stream=pdf_file.name, filetype="pdf")
     
     # Create a temporary directory to store the PNG files
     output_folder = "temp_output_images"