It&#x27;s one of the plugins included with the client. See [1] for more.<p>[1]: <a href="https:&#x2F;&#x2F;letsencrypt.readthedocs.org&#x2F;en&#x2F;latest&#x2F;using.html#webroot" rel="nofollow">https:&#x2F;&#x2F;letsencrypt.readthedocs.org&#x2F;en&#x2F;latest&#x2F;using.html#web...</a>