Updated app,py

app.py

@@ -79,9 +79,10 @@ async def on_chat_start():
     await cl.Message(f"Processing '{pdf_file.name}'...").send()
 
     try:
-        # Copy the uploaded file to a new location
-        temp_file_path = f"temp_{pdf_file.name}"
-        shutil.copy2(pdf_file.path, temp_file_path)
+        # Save the uploaded file to a temporary location
+        temp_file_path = f"/tmp/{pdf_file.name}"
+        with open(temp_file_path, "wb") as f:
+            f.write(pdf_file.content)
 
         # Load and process the PDF
         loader = PyMuPDFLoader(temp_file_path)