Add security recommendations documentation

[soneillf5]

Proposed changes

This change introduces a new section into docs-web/configuration for security best practices.
It should highlight risks, mitigations and best practices that a user should be aware of and responsible for.

Checklist

Before creating a PR, run through this checklist and mark each as complete.

• I have read the CONTRIBUTING doc
• I have added tests that prove my fix is effective or that my feature works
• I have checked that all unit tests pass after adding my changes
• I have updated necessary documentation
• I have rebased my branch onto master
• I will ensure my PR is targeting the master branch and pulling from my branch from my own fork

[pleshakov]

Hi @soneillf5

Could you update https://raw.githubusercontent.com/nginxinc/kubernetes-ingress/master/docs-web/configuration/index.rst so that the document is visible via TOC -- https://deploy-preview-1702--nginx-kubernetes-ingress.netlify.app/nginx-ingress-controller/configuration/security/ ?

[soneillf5]

Hi @soneillf5

Could you update https://raw.githubusercontent.com/nginxinc/kubernetes-ingress/master/docs-web/configuration/index.rst so that the document is visible via TOC -- https://deploy-preview-1702--nginx-kubernetes-ingress.netlify.app/nginx-ingress-controller/configuration/security/ ?

done.

[Jcahilltorre]

Removing the in front of the product name (NGINX Ingress Controller) as it seems to be the standard form in the rest of the docs.

Kept it there for the NGINX Ingress Controller service, as it's referring to the service itself.