google-cloud-function-with-express.js

const functions = require('@google-cloud/functions-framework');
const express = require('express');
const app = express();

// GET /myFunction
app.get('/', async (req, res) => {
  res.status(200).send('Default route');
});

// GET /myFunction/other
app.get('/other', async (req, res) => {
  res.status(200).send('Other route!');
});

/* HTTP Cloud Function.
*
* @param {Object} req Cloud Function request context.
* @param {Object} res Cloud Function response context.
*/
functions.http('myFunction', app);