add chatbot presentation and exemple input

app.py

@@ -219,10 +219,15 @@ os.environ["LANGSMITH_API_KEY"] = os.environ['LANGSMITH_API_KEY']
 
 # lauch gradio app
 import gradio as gr
+
 iface = gr.ChatInterface(
     predict,
-    chatbot=gr.Chatbot(value=[[None, "This bot allows you finding informations related to Rémi Cazelles's projects, work and education"]]),
     api_name="chat",
+    chatbot=gr.Chatbot(placeholder="Hello! This app can help answering question about Rémi Cazelles's projects, work and education."),
+    description="Ask me anything about Rémi’s work, projects, or education. I’ll cite the source documents.",
+    examples=["How many years of experience does Rémi have in python, what significant project did he work on?", 
+              "When did Rémi graduate from his doctorate, what was his reaserch topic about?", 
+              "I have a project in DataENgineering using Microsoft Fabrics for data pipeline, how good is Rémi experience to join a team ASAP?"]
 )
-print("Launch ...")
-iface.launch(share=True)
+
+iface.launch()