const functions = require("firebase-functions"); const admin = require("firebase-admin"); // Firebase authentication var serviceAccount = require("./permission.json"); admin.initializeApp({ credential: admin.credential.cert(serviceAccount), databaseURL: "" //https://[DATABASE NAME].firebaseio.com }); const express = require("express"); const app = express(); const db = admin.firestore(); const cors = require("cors"); app.use( cors({ origin:true }));