Gitlab CI is my weapon of choice here since it’s integrated nicely with Kubernetes. There’s a wealth of tools out there - but the work I do on managing PCGamingWiki is publicly available [1] to give you a starting point. I use Kustomize + kubectl, and when I need to rollback a deployment I can just do it from Gitlab’s environment page.

1: https://gitlab.com/pcgamingwiki/pcgamingwiki