Steps for building Website and app using Ionic

#1

Hey guys
I want to start building a website and app using Ionic 2, angular 2, please tell what are the extra steps I have to follow because I built only Ionic apps,
I have doubts whether website also works same,
How do I modify navigation routing in website, I used navCtrl in ionic app,
how to create funtions or methods for knowing pending messages or new notification that type functions should always run in background so please tell me,
Sometimes the webpage should automatically close.