fix listdir arg

app.py

@@ -81,18 +81,13 @@ def predict(pdf, confidence, generate_file):
         imagelist = sorted(
             [
                 i
-                for i in os.listdir(tmp_dir, filename_without_extension)
+                for i in os.listdir(
+                    os.path.join(tmp_dir, filename_without_extension)
+                )
                 if i.endswith("png")
             ]
         )
         for image in imagelist:
-            # with PILImage.open(os.path.join(tmp_dir, image)) as img:
-            #     size = img.size
-            #     if size[0] > size[1]:
-            #         pdf.add_page("L")
-            #     else:
-            #         pdf.add_page("P")
-            # pdf.image(os.path.join(tmp_dir, image))
             with PILImage.open(
                 os.path.join(tmp_dir, filename_without_extension, image)
             ) as img: