Update app.py

app.py

@@ -21,6 +21,14 @@ STYLE = """
     border: transparent;
     box-shadow: none;
 }
+
+#chatbot {
+    height: 800px; 
+    overflow: auto;
+}
+#chatbot > .wrap {
+    max-height: 780px;
+}
 """
 
 get_local_storage = """