I noticed some slack of communities have entrypoint with *.slack.herokuapp.com .<p>https://botkube-slack.herokuapp.com/
https://www.google.com/search?client=firefox-b-d&q=inurl%3Aslack.herokuapp.com
and so on ...<p>What's the purpose of this heroku app ?
Why not just use slack official : https://postgresteam.slack.com
The invite page is created by a Heroku Elements project <a href="https://elements.heroku.com/buttons/outsideris/slack-invite-automation" rel="nofollow">https://elements.heroku.com/buttons/outsideris/slack-invite-...</a> Its github page has a screenshot <a href="https://github.com/outsideris/slack-invite-automation">https://github.com/outsideris/slack-invite-automation</a><p>I think some communities want a custom invite page explaining what the community is about. The official signin/signup page lacks any customization options.<p>(Both Heroku and Slack are owned by SalesForce these days. The Element project pre-dates those acquisitions)