Refactor demo

app.py

@@ -29,7 +29,7 @@ def greet(name):
     return "Hello " + name + "!!"
 
 
-iface = gr.Interface(fn=greet, inputs="text", outputs="text")
+# iface = gr.Interface(fn=greet, inputs="text", outputs="text")
 # iface.launch()
 
 
@@ -50,4 +50,5 @@ scheduler.add_job(update_datasets, trigger="cron", hour=0, minute=1, timezone=da
 scheduler.start()
 
 
-iface.launch()
+demo = gr.Interface(fn=greet, inputs="text", outputs="text")
+demo.launch()