Renovate has made a lot of progress in predefined configs over the past
few years this patch revisits the current config and extends it with the
usage of new presets.

Reference:
https://docs.renovatebot.com/configuration-options/#osvvulnerabilityalerts
https://github.com/renovatebot/renovate/discussions/20542

This patch drops the negative lookahead as this is apparently not
supported by renovate since it uses re2.

References:
https://github.com/renovatebot/renovate/discussions/16472

This patch should improve go mod handling of renovate

This patch adjusts the renovate config to allow upgrades to version 38

This patch adjusts renovate to automatically assign MRs to me, in order
to utilise the GitLab todo feature a bit better.

As I still maintain the demo instance, it's useful to integrate the demo
instance into the current terraform configuration, this allows it to
benefit from further developement of this repository.

The current README and variable descriptions should help anyone
interested in creating their own demo instance equivalent, to deploy
this to their hetzer cloud account. Even if not, it might provide some
nice inspiration regarding the instance handling.

This patch enables digest pinning for renovate updates, this should help
to keep everything updates even while using mutable tags, such as
`stable` for CoreOS.

This patch should group up the rook operator and cluster updates into one
Merge Requests instead of multiple, in order to reduce potential
incompatiblities.

This patch implements a trivial syncthing setup, which should provide a a good place to sync data to.

This patch enables updates of the fedora containers to version
37 and makes sure that all fedora registry references are
picked up.

This patch should fix the current problem that the renovate
annotation is not picked up by renovate as intended, resulting
in not updating the image appVersion in the helm charts.

This patch increases the amount of MRs that can be open at the
same time, to improve batch updates, given the growing number
of software deployed by this repository.

This patch replaces almost all occations where Fedora 35 is used with the old
registry.fedoraproject.org/fedora registry and replaces it with the new
quay.io-based fedora repository and version 36.