title: Headers for security
body: <p>I've been reading articles about the protection of your website and they say to place these 3 headers:</p>
  
  <ul>
  <li>X-Frame-Options: DENY</li>
  <li>X-XSS-Protection: 1; mode=block</li>
  <li>X-Content-Type-Options: nosniff</li>
  </ul>
  
  <p>In my website to protect it from Website attacks, but I dont know how to declare it in my header, can someone help me with this please?</p>
  
  <p>Does this goes in the HTML or into the server?</p>