events {
    worker_connections 1024;
}
http {
    server {
        listen       80;
        server_name  www.example.com;

        charset utf-8;
        access_log  /root/www.example.com.log;

        location /(css|img)/ {
            access_log off;
            expires 1d;

            root "/root/";
            try_files $uri @backend;
        }

        location / {
            try_files /_not_exists_ @backend;
        }

        location @backend {
            proxy_set_header X-Forwarded-For $remote_addr;
            proxy_set_header Host            $http_host;
            proxy_pass http://127.0.0.1:8080;
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";
        }
    }
}