add example

app.py

@@ -1,11 +1,12 @@
 import gradio as gr
 import spaces
 from transformers import pipeline
+import os
 
 pipe = pipeline("summarization", model="ShynBui/Bartpho_spelling_correction")
 
 def greet(text):
     return pipe(text, max_new_tokens= 512)[0]['summary_text']
 
-demo = gr.Interface(fn=greet, inputs=gr.Text(), outputs=gr.Text())
+demo = gr.Interface(fn=greet, inputs=gr.Text(), outputs=gr.Text(), examples=eval(os.environ['DES_EXAMPLE']))
 demo.launch()