Notification for all repos when deployment stage reaches a certain status (Staging)

[lynette]

I want to know if there is a way via Slack or some other type of notification that will alert me when a deployment reaches a certain deployment stage across all of our repos. For example - I want to know which PRs need to be promoted to Production and would like to get an alert when it gets to the Staging level. We do have Slack notifications setup and I've gone through the options there, but nothing really covers it. I'm guessing this isn't something supported at this time but wanted to try. Thanks in advance!