feat: 从甘肃完整复制过来，下一步在改内容

node1.js

@@ -0,0 +1,5 @@
+const express = require('express')
+const app = express()
+app.get('/', (req, res) => res.send('Hello World!'))
+app.use(express.static('./www'))
+app.listen(3000, () => console.log('Example app listening on port 3000!'))