Fix another bug

app.py

@@ -22,7 +22,8 @@ for idx, url in enumerate(urls):
 
 def process_image(image):
     # prepare 8 images, shape (8, 1024)
-    encoding = feature_extractor([image for _ in range(8)], return_tensors="pt")
+    batch_size = 8
+    encoding = feature_extractor([image for _ in range(batch_size)], return_tensors="pt")
 
     # create primers
     samples = encoding.pixel_values.numpy()