Botkit and https secure endpoint, is a certificate mandatory?
<p>I'm building a custom slack app with botkit framework and I'm trying to add a interaction button in my Bot/App.</p>

<p>I don't really catch one thing, as the botkit framework provides a way to have a webhook entry and setuped server to receive oauth requests and slack's requests for interactive buttons callbacks, does having a secured server with Https, certificate and all that stuff is mandatory for slack's API to perform POST requests on my server after hitting a interactive button?</p>