Update app.py

app.py

@@ -25,7 +25,7 @@ def process_images(files):
     files_str = ','.join([f.name for f in files])
     hashdir = hashlib.md5(files_str.encode('utf8')).hexdigest()
     hashdir_path = os.path.join(TMP_DIR, hashdir)
-    hashdir_path_img = os.path.join(hashdir_path_img, 'images')
+    hashdir_path_img = os.path.join(hashdir_path, 'images')
     os.makedirs(hashdir_path_img, exist_ok=True)
     saved_files = move_uploaded_files(files, hashdir_path_img)
     saved_files_str = ' '.join(saved_files)