title: How to prevent from clickjacking attack in angular-4 application?
body: <p>I want to stop my angular application to be open in an IFRAME.
  I read some article on google and came to know that in order to achieve this we have to set X-Frame-Options. But I did not find the way to give this header. </p>
  
  <p>Can anyone help me that how can I achieve this in angular-4?</p>