Robots.txt
User-agent: * Disallow: /
https://support.google.com/webmasters/answer/93710?hl=en
<meta name="robots" content="noindex">
web_development:robots-txt
User-agent: * Disallow: /
https://support.google.com/webmasters/answer/93710?hl=en
<meta name="robots" content="noindex">