Update app.py

app.py

@@ -40,6 +40,9 @@ pn.template.FastListTemplate(
     site_url="https://awesome-panel.org",
     logo="https://panel.holoviz.org/_static/logo_horizontal_dark_theme.png",
     title="mapwidget.cesium",
+    theme="dark",
+    theme_toggle=False,
+    main_layout=None,
     main=[component],
     sidebar=[description],
 ).servable()