Nginx Cookieless Domain

nginx-cookieless.conf

#
# Name: nginx-cookieless.conf
# Auth: Chris van Steenbergen <cvsteenbergen@gmail.com>
# Date: 12 August 2016
# Desc: Nginx Cookieless Domain configuration for 100% performance grade with 
#
# See for yourself at: https://tools.pingdom.com/#!/beJG0v/http://www.reclick.nl
#

server {
        listen *:80;
        listen [::]:80;

        server_name static.reclick.nl;

        log_not_found off;
        error_log off;
        fastcgi_hide_header Set-Cookie;
       
        root /srv/www/laravel5/public;

        location / {
                if ($request_filename ~ "\.(css|js|jpg|jpeg|gif|ico|png|bmp|pict|csv|doc|pdf|pls|ppt|tif|tiff|eps|ejs|swf|midi|mid|ttf|eot|woff|otf|svg|svgz|webp|docx|xlsx|xls|pptx|ps|class|jar|woff2|less|scss)$") {
                        add_header Pragma "public";
                        add_header Cache-Control "public, must-revalidate, proxy-revalidate";
                        add_header Access-Control-Allow-Origin *;
                        access_log off;
                        expires 1M;
                        break;
                }
        return 302 http://www.reclick.nl$request_uri;
}

Where do I upload this?

fastcgi_hide_header Set-Cookie;

It's resolved in https://gtmetrix.com for my domain