cloud functions2 firebase2 cloud firestore1 custom claims1 daily check-in1 dark mode1 deploy targets1 elderly care1 emergency alerts1 firebase admin1 firebase firestore backup restore1 firestore backup1 flutter1 google cloud storage1 guest access1 gui graphical user interface1 knockk1 localization1 lone worker app1 mobile1 progressive web app1 push notifications1 pwa1 react serverless web application1 safety check-in1 safety circle1 standalone full application1