Document release process

[aojea]

• define tagging and checklist to update
  • helm chart
  • ...
• automate image building Set up automatic builds and image pushing #15
• promote to registry bumpt kube-network-policies to v0.5.0 kubernetes/k8s.io#7034

[emabota]

/assign

[emabota]

Hi @aojea , beginner here, can I get some orientation on how to start? What resources should I read/check? Thank you.