show latest instead of oldest

app.py

@@ -132,7 +132,7 @@ def showcase(access_key):
     if not access_key==os.getenv('access_key'):
         chatbot_ret = [(f"Your entered Access Key:<br>{access_key}<br>is incorrect.", f"So i cannot provide you any information in this private space.")]
     else:
-        recent_qas = qas[:10]
+        recent_qas = qas[-10:]
         chatbot_ret = [(f"Your entered Access Key is correct.", f"The latest {len(recent_qas)} query-responses are displayed below.")]
         for qa in recent_qas:
             chatbot_ret += [(qa["q"].replace("\n","<br>"), str(qa["a"]).replace("\n","<br>"))]