add prompt example

app.py

@@ -107,7 +107,8 @@ with gr.Blocks(css=css) as app:
         with gr.Row():
             with gr.Column(scale=1):
                 prompt = gr.Textbox(
-                    label="Prompt", info='''Describe the subject. Include clothes and hairstyle for more consistency.'''
+                    label="Prompt", info='''Describe the subject. Include clothes and hairstyle for more consistency.''',
+                    value="a person, darkblue suit, black tie, white pocket"
                 )
         
                 subject = gr.Image(