Feat: update rules

public/index.html

@@ -102,6 +102,8 @@ <h1>Limits and restrictions</h1>
  <li>Only public channels;</li>
  <li>RPM Limit: 15 requests per minute;</li>
  <li>Temporary ban on any error, for example: invalid channel name or private channel.</li>
+ <li>Forbidden to use service for media hosting. For example, to show images or video to users at webpage. Please use nginx reverse proxy + nginx cache at backend;</li>
+ <li>Forbidden to access same channels/media from many different clients. Please use nginx reverse proxy + nginx cache at your backend;</li>
  </ul>
  <h1>Contacts</h1>
  <ul>