Webhook documentation recommends Postee, which is unmaintained

[rfletcher]

What steps did you take and what happened:

Postee is now officially unmaintained, but trivy-operator's latest webhook integration documentation still recommends it:

The latter use case can be fulfilled by using a SOAR tool Postee. Out of the box, Postee offers a variety of integrations with other third party services such as ServiceNow, Slack, AWS Security Hub and many more.

What did you expect to happen:

The example is helpful, but the documentation should be updated to recommend a maintained Postee alternative.

Anything else you would like to add:

Any context around the retirement of Postee would be welcome, too. (Please!) The Postee PR has no information at all. Is it now unmaintained in favor of other automation from Aquasec? If not, is there a recommended third-party replacement?

Environment:

• Trivy-Operator version (use trivy-operator version): master
• Kubernetes version (use kubectl version): n/a
• OS (macOS 10.15, Windows 10, Ubuntu 19.10 etc): n/a