Kustomize

[sagikazarmark]

Fixes #377
Fixes #383

Changes proposed on the PR:

• Add kustomize installation

Couple notes:

• This PR adds a number of steps to release preparation
  • manifests/kustomize/components/version/kustomization.yaml needs to be updated with the next version
  • in case you want to upload a generated manifest to the GitHub Release page, it has to be done manually for now
  • README has to be updated with the latest version
  • The main branch should always reference the latest stable version (or the latest development version if that's preferred). Therefore, before tagging the image version has to be updated before tagging and reverted afterwards (for example an RC release tag should reference the RC image, but the main branch should continue pointing to the last stable/dev version)
• The README references v1.2.0 as an example, although it hasn't been released yet
• The current process copies (duplicates) the CRD file

This setup could later be improved with an automated release mechanism that compiles the final yaml file and publishes it to GitHub Releases.

[ese]

Great, Thanks for the PR and detailed notes :)

[sagikazarmark]

Thanks for merging. Excited to see this in the next release!