* Firebase's Realtime Database + Storage utility. * Please complete the free google firebase account creation before use. Installation teaching: http://shioulo.no-ip.org/app/PorjectTeamFirebase step: 1. Apply for an account 2. Create a project, enter the project to get the google-services.json file 3. Create an account in the project () 4. Enable the ** realtime database ** function 5. Turn on the storage function Function introduction: This is an integrated app that combines group project and