Update app.py

app.py

@@ -776,7 +776,7 @@ def build_demo(models):
 if __name__ == "__main__":
 
     # IP address to modify
-    controller_url = "http://34.173.116.249:80"
+    controller_url = "http://34.71.218.29:80"
     host = "0.0.0.0"
 
     concurrency_count = 10