Support RSS feeds by generating data in Atom format

[PushkarJ]

Description

We want to maintain an index.xml equivalent of https://kubernetes.io/docs/reference/issues-security/official-cve-feed/index.json
so folks can subscribe to the auto-refreshing CVE feed when a new CVE comes up.

Details

We can use the kubernetes blog RSS feed to get started as an example:

• Feed: kubernetes.io/feed.xml
• Code: https://github.com/kubernetes/website/blob/main/layouts/index.rss.xml

The CVE feed items can be iterated similar to how it is done for index.json

Hugo RSS generator: https://gohugo.io/templates/rss/

Testing / Validation

https://validator.w3.org/feed/#validate_by_input

[mtardy]

Ok, I can do this, I just spent one hour wondering why no index.xml appeared and it was just because the Kubernetes website had the "good" idea to rename the default index to feed for RSS in the global config 🙃

/assign

[sftim]

/triage accepted
(why not?)

[PushkarJ]

/sig security docs
/area security

[k8s-ci-robot]

@PushkarJ: The label(s) area/security cannot be applied, because the repository doesn't have them.

In response to this:

/sig security docs
/area security

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