VoiceService.js

const express = require("express");
const VoiceResponse = require("twilio").twiml.VoiceResponse;

const app = express();

// Returns TwiML which prompts the caller to record a message
app.post("/record", (request, response) => {
  // Use the Twilio Node.js SDK to build an XML response
  const twiml = new VoiceResponse();
  twiml.say("Hello. Please leave a message after the beep.");

  // Use <Record> to record and transcribe the caller's message
  twiml.record({ transcribe: true, maxLength: 30 });

  // End the call with <Hangup>
  twiml.hangup();

  // Render the response as XML in reply to the webhook request
  response.type("text/xml");
  response.send(twiml.toString());
});

// Create an HTTP server and listen for requests on port 3000
app.listen(3001);