slash_url_error_handling

const express = require('express'); const app = express(); app.use(express.json()); app.use(express.urlencoded({extended: true})); const port = 3000; app.post('/', (req, res) => { const channelId = req.query.channel_id; const response = { response_type: 'in_channel', type: 'system_message', text: 'Extra response 2', channel_id: channelId, extra_responses: [ { response_type: 'in_channel', text: 'Hello World', channel_id: channelId, }, ], }; res.status(200).send(response); }); app.listen(port, () => console.log(`Server app listening at http://localhost:${port}`));