Release tags for docker images

[ksoftirqd]

Hi,

Manifests in the latest release branch (v0.12.0) don't use image tags with docker images and the corresponding tags are missing in the docker registry (the latest one available is v0.11.0-gke.3, it seems).

It would be great to tag the corresponding images with v0.12.0 -- this would considerably simplify the upgrade process.

Thank you

[bernot-dev]

Thank you for this feedback. We are aware of this issue and looking into options to create the tags.

[pintohutch]

Hey @ksoftirqd - we have fixed our image tagging issue and are beginning to re-populate our manifests with the tags.

I supplemented the v0.12.0 release tag with https://github.com/GoogleCloudPlatform/prometheus-engine/releases/tag/v0.12.0-imgtag that uses the tagged images in the install manifests.

Closing the issue.