The docker/metadata-action uses github.sha for the SHA tag, which for
pull_request_target events is the base branch commit, not the PR head.
The comment step was independently constructing SHA tags from the PR
head SHA, causing preview URLs that didn't match any actual docker
image tag. Now reads the actual tags from docker meta output instead.
Add a github-script step to the preview workflow that creates or updates
a comment with preview URLs (pr-number and per-commit SHA) and Docker
image tags. Past SHA URLs are preserved across pushes so reviewers can
access any previously built version.
This PR contains the following updates:
| Package | Type | Update | Change |
|---|---|---|---|
|
[docker/setup-buildx-action](https://redirect.github.com/docker/setup-buildx-action)
([changelog](e468171a9d..8d2750c68a))
| action | digest | `e468171` -> `8d2750c` |
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