Just randomly stumbled upon this. Thanks youtube! Also, surprise cameo!
https://www.youtube.com/watch?v=LgGQ-oGbjF0
https://www.youtube.com/watch?v=LgGQ-oGbjF0
follow_along_with_video_below_to_see_how_to_install_our_site_as_web_app
Note: this_feature_currently_requires_accessing_site_using_safari