実装手順 ❶ パッケージを用意する yarn add firebase firebase-tools ❷ package.jsonを編集する package.json { "name": "functions-to-firestore", "scripts": { "login": "firebase login", "init": "firebase init", "emulate": "firebase emulators:start", "deploy": "firebase deploy" }, "dependencies": { "firebase": "^10.13.0", "fi…