// 元のコードからAPIキーなどを流用
const firebaseConfig = {
    apiKey: "AIzaSyDVHIy3Me_Q345pGl1IsnhkcaNMp1Ql1XM",
    authDomain: "jssig-c7900.firebaseapp.com",
    databaseURL: "https://jssig-c7900.firebaseio.com",
    projectId: "jssig-c7900",
    storageBucket: "jssig-c7900.appspot.com",
    messagingSenderId: "759251623713",
    appId: "1:759251623713:web:7747780f81566f67fbe860"
};
firebase.initializeApp(firebaseConfig);
const database = firebase.database();