Release notes for v1.8.0

Changelog since v1.7.0

Changes by Kind

Feature

• Add Mattermost database read replica configuration (#178, @gabrieljackson)

Other (Cleanup or Flake)

• Bump default Mattermost version to 5.27.0 (#182, @gabrieljackson)

The image for this release is docker.io/mattermost/mattermost-operator:v1.8.0

Thanks to all our contributors!