A simple working example for embedding dash in flask under a path

Dash documentation lacks a simple but full working example of how to embed dash layout as a path in a flask app, so that the dash layout becomes a div in the flask and follows the base template. For example  path '/plot&type=plot1' return dash layout for plot type 1.
I know that one can get the underlying flask app in dash, but how to get rendered dash layout in flask is not well documented. 
