NGINX cookie free domain config setup small issue

Hi,

I have bought this domain --> https://www.cdnwknet.com/ to be my cookie free domain. I would like to serve static content from it.

All I need to do is to set it up correctly. At the moment it does not work as I want it to work. I have put images on that domain which can be viewed here --> https://www.cdnwknet.com/img/index.php. I am only displaying the images in that folder of IMG using scandir so the images are in that folder on that domain.

I tested to call the images from my site --> https://www.damircalusic.se/portfolio/ and than I ran GTMETRIX to see if they are served as static images but they were not as you can see in this report --> http://gtmetrix.com/reports/www.damircalusic.se/YGFX2COr and under YSLOW, CDN.

So my simple question is: How do I config the cdnwknet.com domain?

I would really appreciate any help with this!

My config looks like this at the moment:

server {
  listen 80;
  listen [::]:80;
  server_name cdnwknet.com www.cdnwknet.com;
  add_header Strict-Transport-Security max-age=15768000;
  return 301 https://www.cdnwknet.com$request_uri;
   }
  
  server {
  listen 443 ssl;
  server_name cdnwknet.com;

  ssl_certificate /etc/nginx/ssl/bundle.crt;
  ssl_certificate_key /etc/nginx/ssl/KEY.key;

  ssl_protocols SSLv3 TLSv1 TLSv1.1 TLSv1.2;
  ssl_ciphers ALL:!aNULL:!ADH:!eNULL:!LOW:!EXP:RC4+RSA:+HIGH:+MEDIUM;
  ssl_prefer_server_ciphers on;

  return 301 https://www.cdnwknet.com$request_uri;
  }

  server {
  listen 443 ssl;
  server_name www.cdnwknet.com;
  root /var/www/cdnwknet.com/html;
  index index.php index.html index.htm;
  
  ssl_certificate /etc/nginx/ssl/bundle.crt;
  ssl_certificate_key /etc/nginx/ssl/KEY.key;
  
  ssl_protocols SSLv3 TLSv1 TLSv1.1 TLSv1.2;
  ssl_ciphers ALL:!aNULL:!ADH:!eNULL:!LOW:!EXP:RC4+RSA:+HIGH:+MEDIUM;
  ssl_prefer_server_ciphers on;

  error_page 403 /error/403.html;
  error_page 404 /error/404.html;
  
  charset utf-8;
  
  if ( $request_uri ~ ^(/index\.php)$ ) {
      return 301 https://www.cdnwknet.com;
  }
  
  location / {
  	try_files $uri $uri/ =404;
      expires max;
      add_header Pragma public;
      add_header Cache-Control "public, must-revalidate, proxy-revalidate";
      access_log off;
      log_not_found off;
      fastcgi_hide_header Set-Cookie;
      tcp_nodelay off;
      break;
  }

  location ~ \.php$ {
  	try_files $uri =404;
  	fastcgi_split_path_info ^(.+\.php)(/.+)$;
  	fastcgi_pass unix:/var/run/php5-fpm.sock;
  	fastcgi_index index.php;
  	include fastcgi_params;
  }
  
  location = /error/403.html {
  	root /var/www/cdnwknet.com/html;
  	allow all;
  }
  
  location = /error/404.html {
  	root /var/www/cdnwknet.com/html;
  	allow all;
  } 
  }