text: import polka from 'polka';
  import * as sapper from '@sapper/server';
  
  import { start } from '../../common.js';
  
  const app = polka()
  	.use((req, res, next) => {
  		req.hello = 'hello';
  		res.locals = { name: 'world' };
  		next();
  	})
  	.use(
  		sapper.middleware({
  			session: async (req, res) => {
  				if (req.url === '/error') {
  					throw new Error('error');
  				}
  				return { title: `${req.hello} ${res.locals.name}` };
  			}
  		})
  	);
  
  start(app);
  