add application file

app.py

@@ -1,6 +1,6 @@
-import gradio as gr
-
-def greet(name):
-    return f'Hello' + {name}!"
-
+import gradio as gr
+
+def greet(name):
+    return f'Hello' + {name}!"
+
 gr.Interface(fn=greet, inputs='text', outputs='text').launch()