Use kubectl instead of oc in the example

Dont use reflection for basic string equality test

Add tests for mutator handler

Extract pod mutation to own method

This will make unit testing easier.

Add container test

Refactor the handler to its own type

Document containerBuilder

Don't export newContainerBuilder

Fix not building and pushing the image to quay

Use builder pattern to create the container

Move annotation functions and vars to own file

Move handler to own pkg

Remove false statement about contrib license

I was trying to add an existing script which was using openssl to
generate the certificate but I could not get it to work so I opted to
use cfssl and the script is my own. Heh.

Document the deployment process

Add kustomize files to deploy the webhook

Currently we use the SECRET section to deploy the webhook using the
secret generated with contrib/generate-certs.sh.

Add sourcehut CI

Add annotation to inject secret key from secret

Use variable for various annotations

Use annotations to generate the mkproof-proxy container

Use controller-runtime response functions