title: How can I get the hosting url instead of functions url in firebase functions for https
body: <p>I have dynamically generated urls that I need to create for staging and production environments. I am doing a mix of Firebase hosting and functions.  I am also using Firebase config to route urls to my Firebase functions "app". When I try to get the hosting url when I visit my site with req.get('host') inside a Firebase function I get the functions url. How can I get the Hosting url? - the url that triggered the firebase function?</p>