server.js

// @ts-nocheck TODO: remove at some point

// TODO: what todo with those two imports? needed? if so why and how?
//import config from './config';
//import './css/index.css';

import sirv from 'sirv';
import polka from 'polka';
import compression from 'compression';
import * as sapper from '@sapper/server';

const {
	PORT,
	NODE_ENV
} = process.env;
const dev = NODE_ENV === 'development';

polka()
	.use(
		compression( {
			threshold: 0
		} ),
		sirv( 'static', {
			dev
		} ),
		sapper.middleware( {
			session: ( req, res ) => {
				return {}
			}
		})
	)
	.listen( PORT, err => {
		if ( err ) console.log( 'error', err );
	} );









	I get this error when running 'firebase deploy' for this sapper project