问使用www时映射到AppEngine (Flex/Node) 404 s的自定义域

EN

runtime: nodejs
env: flex

// [START gae_flex_node_static_files]
'use strict';

const express = require('express');
const app = express();

app.set('view engine', 'pug');

// Use the built-in express middleware for serving static files from './public'
app.use('/static', express.static('public'));

app.get('/', (req, res) => {
  res.render('index');
});

// Start the server
const PORT = process.env.PORT || 8080;
app.listen(PORT, () => {
  console.log(`App listening on port ${PORT}`);
  console.log('Press Ctrl+C to quit.');
});

// [END gae_flex_node_static_files]
module.exports = app;