docs(related): add CI/CD docs
docs(related): add CI/CD docs

Closes #1564

bacongobbler/helm,fibonacci1729/helm,jascott1/helm,adamreese/helm,appscode/helm,flynnduism/helm,rbwsam/helm,qwangrepos/helm,adamreese/deployment-manager,adamreese/deployment-manager,kdada/helm,michelleN/deployment-manager,technosophos/deployment-manager,technosophos/deployment-manager,FengyunPan/helm,FengyunPan/helm,michelleN/deployment-manager,michelleN/deployment-manager,flynnduism/helm,thomastaylor312/helm,SlickNik/helm,thomastaylor312/helm,yan234280533/helm,technosophos/k8s-helm,jascott1/helm,technosophos/deployment-manager,yan234280533/helm,adamreese/deployment-manager,sushilkm/helm,qwangrepos/helm,helm/helm,helm/helm,eicnix/helm,rbwsam/helm,technosophos/deployment-manager,bacongobbler/helm,eicnix/helm,SlickNik/helm,technosophos/k8s-helm,adamreese/helm,adamreese/deployment-manager,technosophos/deployment-manager,sushilkm/helm,kdada/helm,michelleN/deployment-manager,fibonacci1729/helm,appscode/helm,adamreese/deployment-manager