Send anomaly alerts to slack

[iporollo]

Problem

I need to be alerted in slack when monosi detects anomalies.

Solution

Set up monosi to take a slack connection for sending alerts and information.

Requirements

Slack workspace exists and one can retrieve the webhook for it to send events to.

Additional Context

The easiest way here would be simply add a way for input of a slack webhook URL and then sending a payload to that URL.

[unkrich]

We are now sending slack alerts when running the server. Marking complete and closing.