Update app.py

app.py

@@ -334,7 +334,7 @@ transform = transforms.Compose([
 def read_content(file_path):
     """read the content of target file
     """
-    with open(file_path, 'rb', encoding='utf-8') as f:
+    with open(file_path, 'rb') as f:
         content = f.read()
 
     return content