The merging/tagging process

• ensure the PR has been approved and all status checks on the PR are green - some tests don't run on every build to save on money so may need to be triggered

• use the "squash and merge" button to merge the PR, and the branch should automatically be deleted

• go to the releases section of the repo (example) and click "draft a new release"

• add the new version number (using the semver system) in the "choose a tag" input and create

• click the "generate release notes" button to populate the description

• click "publish release" and that's it! This will create a new circleci build which publishes the tagged image to preprod and prod.