var koa = require('koa');
var app = koa();

app.use(function *() {
    console.log('some is coming');
    this.body = 'hello world';
});

app.listen(3000, function() {
    console.log('server is listening');
});

@@ -146,11 +146,11 @@
 ten(
-300
+808
 0, f

修改端口为8080