It’s a tool to manage docker stacks, e.g. by reading them from git repos. You can configure your git forge in a way to ping Komodo when something in a repo changed, Komodo then deploys the new version. You’d need your own git forge, e.g. forgejo. This is a good guide:

nickcunningh.am/…/how-to-automate-version-updates…

You can start without Renovate to get going, but you’ll want it sooner or later to automate checks for updates.