Javascript Can'；作为代理运行node.js时，请不要运行route

我使用nginx作为服务器，node.js作为代理（listen:3000），有一个名为user的路由，代码如下

exports.index = function (req, res){
  res.render('user', {
        id: req.params.id
    });
};

如果我跑。。。它工作得很好，但如果我跑步。。。它显示错误“404”，并且运行良好，那么如何修复它呢

nginx配置：

    listen 80;
    server_name domain.com www.domain.com;
    index index.html index.htm index.php;

    # Make site accessible from http://localhost/
    if ($host = 'www.domain.com' ) {
            rewrite ^/(.*)$  http://domain.com/$1   permanent;
    }


    location / {
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header Host $http_host;
            proxy_set_header X-NginX-Proxy true;
            proxy_pass http://127.0.0.1:3000/;
            proxy_redirect off;
            # First attempt to serve request as file, then
            # as directory, then fall back to displaying a 404.
            try_files $uri $uri/ =404;
            # Uncomment to enable naxsi on this location
            # include /etc/nginx/naxsi.rules
    }

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nginx config中有什么内容？@alexeyten请看我的更新