put legend on the bottom

app.py

@@ -124,7 +124,7 @@ def prompt_to_layout(user_prompt, intensity, fpath=None):
     html = '<img class="labels" src="images/labels.png" />'
     
     legend = Image.open("labels.png")
-    imgs_comb = np.vstack([legend, im])
+    imgs_comb = np.vstack([im, legend])
     imgs_comb = Image.fromarray(imgs_comb)
     
     return imgs_comb