SSR entrypoint on firebase for Sapper

index.ts

import * as functions from 'firebase-functions';
//const express = require('express');

// Start writing Firebase Functions
// https://firebase.google.com/docs/functions/typescript

// We have to import the built version of the server middleware.
const { server } = require('../__sapper__/build/server/server');
exports.ssr = functions
    .region('us-central1')
    .https.onRequest(server);

//export const ssr = functions.https.onRequest((_req, res) => res.send('hello from the SSR function'));