Update app.py

app.py

@@ -253,7 +253,7 @@ async def upload_file(file: UploadFile = File(...), padding_type: str = Form(...
             <img class="banner" src="/static/images/banner.jpg" alt="Banner" width="100%">
             <h2>Image successfully rectangled!</h2>
             <!--<img src='data:image/jpeg;base64,display_encoded_img'/>-->
-            <img src='data:image/jpeg;base64,{display_img}'/>
+            <img src='data:image/jpeg;base64,{display_img.thumbnail((desired_width, desired_height))}'/>
             <p><a href="data:image/jpeg;base64,{full_size_encoded_img}" download="rectangled_image.jpg">
             Download Full-Size Image</a></p>
             <p><a href="/">Back</a></p>