const line = require('@line/bot-sdk');
const express = require('express');
const bodyParser = require('body-parser');

const config = {
  channelAccessToken: '你的ChannelAccessToken',
  channelSecret: '你的ChannelSecret',
};

const client = new line.Client(config);
const app = express();
app.use(bodyParser.json());

// 表單送出後呼叫這個 API
app.post('/sendLine', (req, res) => {
  const { name, phone, service, date, time, note } = req.body;

  const message = {
    type: 'text',
    text:
      `📩 新預約通知\n` +
      `👤 姓名：${name}\n` +
      `📞 電話：${phone}\n` +
      `💆‍♀️ 服務：${service}\n` +
      `📅 日期：${date}\n` +
      `⏰ 時間：${time}\n` +
      `📝 備註：${note}`
  };

  // 發訊息給自己 LINE ID 或群組 ID
  client.pushMessage('你的UserID或群組ID', message)
    .then(() => res.json({ status: 'ok' }))
    .catch(err => res.status(500).json({ error: err.message }));
});

app.listen(3000, () => console.log('Server running on port 3000'));

<script defer data-domain="html.cafe" src="https://milkymouse.com/js/script.js"></script>