如何在本地Node.js脚本中使用firebase admin SDK？

npm install firebase-admin --save

const admin = require('firebase-admin');

const serviceAccount = require('path/to/serviceAccountKey.json');

admin.initializeApp({
  credential: admin.credential.cert(serviceAccount)
});

const db = admin.firestore();

const docRef = db.collection('users').doc('user1');

docRef.get()
  .then((doc) => {
    if (doc.exists) {
      console.log('用户数据：', doc.data());
    } else {
      console.log('找不到该用户！');
    }
  })
  .catch((error) => {
    console.log('获取用户数据时出错：', error);
  });

const message = {
  notification: {
    title: '新消息',
    body: '您有一条新消息！'
  },
  topic: 'news'
};

admin.messaging().send(message)
  .then((response) => {
    console.log('推送通知已发送：', response);
  })
  .catch((error) => {
    console.log('发送推送通知时出错：', error);
  });