Refactor app.py to include lazy loading for images

app.py

@@ -149,12 +149,14 @@ def init_detailed_results():
 """)
 
 
-HEAD = "\n".join(
+HEAD = "".join(
     [
         f'<link rel="stylesheet" href="{css}">' for css in CSS_EXTERNAL
     ]
 )
 
+print("HEAD:", HEAD)
+
 demo = gr.Blocks(css=custom_css, head = HEAD)
 with demo:
     gr.HTML(TITLE)