fix to append

app.py

@@ -41,7 +41,8 @@ def generate_images(pose_image, canny_image, prompt):
         num_inference_steps=20,
     )
     all_outputs = []
-    all_outputs.append(pose_image, canny_image)
+    all_outputs.append(pose_image)
+    all_outputs.append(canny_image)
     for image in output.images:
         all_outputs.append(image)
     return all_outputs