Update app.py

app.py

@@ -97,6 +97,8 @@ page = vm.Page(
     ],
 )
 
-dashboard = vm.Dashboard(pages=[page])
+app = Vizro().build(dashboard)
+server = app.dash.server
 
-app = Vizro().build(dashboard).dash
+if __name__ == "__main__":  
+    app.run()