ADD file via upload

app.js

@@ -0,0 +1,17 @@
+const express = require('express');
+const app = express();
+const router = require('./router');
+const bodyParser = require('body-parser');
+
+// 中间件
+app.use(bodyParser.json());
+app.use(bodyParser.urlencoded({ extended: true }));
+
+// 使用路由
+app.use('/', router);
+
+// 监听端口
+const PORT = process.env.PORT || 3000;
+app.listen(PORT, () => {
+    console.log(`Server running on port ${PORT}`);
+});