Update app.py

app.py

@@ -3,6 +3,9 @@ import gradio as gr
 def greet(name):
     return f"Hello {name}!"
 
+demo = gr.Interface(fn=greet, inputs="text", outputs="text")
+
+
 def create_app():
     with gr.Blocks() as demo:
         gr.Markdown("## Simple Greeting App")