I don’t like helm, so I use nix to maintain my fediverse deployments in kubernetes. Typically that’d just autoupdate itself to new releases, but for lemmy specifically I upgrade by hand nowadays since one release some time ago broke my deployment and its schema change was incompatible with the automated rollback.

My setup is a combination of github.com/farcaller/nixdockertag (auto-updated docker imagesfor things where I fully own the deployments) and github.com/farcaller/nixhelm (for helm charts that I either consume verbatim PR have local patches on). Both just auto update nightly thanks to github.