Feature Request: Slack Notifications on Error

[francistogram]

I know you have this integration at the webhook level (shown below) but for simply being notified of errors I think would be nice to set it once and forget it instead of having to set on each job + not having to go through another app like Zapier just to get Slack notifications

We do this in our own app and users will integrate Slack, choose a channel e.g. #failed-cron-jobs, and then anytime it errors we'd get an alert like this

Where we could quickly see the error (if there is one) and/or error code and click the name of the job to view the job and execution in more detail

Would be easy and free to do with Slack Webhooks and then messaging style using their block kit