Nginx site configuration for Node.js app

myapp_nginx

    upstream myapp_upstream {
        server 127.0.0.1:3000;
        keepalive 64;
    }

    server {
        listen 8080;

        server_name myapp.com;

        return 301 $scheme://www.myapp.com$request_uri;
    }

    server {
        listen 8080;

        server_name www.myapp.com;

        error_page 400 404 500 502 503 504 /50x.html;
        location  /50x.html {
                internal;
                root /usr/share/nginx/www;
        }

        location ~ ^/(images/|img/|javascript/|js/|css/|stylesheets/|flash/|media/|static/|robots.txt|humans.txt|favicon.ico|home/|html|xml) {
            root /home/ubuntu/myapp/public;
            access_log off;
            expires max;
        }

        location / {
            proxy_redirect off;
            proxy_set_header   X-Real-IP            $remote_addr;
            proxy_set_header   X-Forwarded-For  $proxy_add_x_forwarded_for;
            proxy_set_header   X-Forwarded-Proto $scheme;
            proxy_set_header   Host                   $http_host;
            proxy_set_header   X-NginX-Proxy    true;
            proxy_set_header   Connection "";
            proxy_http_version 1.1;
            proxy_pass         http://myapp_upstream;
            proxy_intercept_errors on;
        }
    }