location ~ .*\.(jpg|gif|png)$ {
        gzip on(开启);
        gzip_http_version 1.1(版本);
        gzip_comp_level 2(压缩比);
        gzip_types(文件类型) text/plain application/javascript application/x-javascript text/css application/xml text/javascript application/x-httpd-php image/jpeg image/gif image/png;
        root  /opt/app/code/images;
    }

location ~ ^/download {
        gzip_static on(开启);
        tcp_nopush on;
        root /opt/app/code;
    }

 location ~ .*\.(htm|html)$ {
        add_header Access-Control-Allow-Origin(跨域访问的请求域名) *(表示所有);
        add_header Access-Control-Allow-Methods(跨域访问的请求方法) GET,POST,PUT,DELETE,OPTIONS;
        expires 24h(缓存周期);
        root  /opt/app/code;
    }