Switch CI builds from docker build to docker buildx build

The legacy Docker builder is deprecated and will be removed in a future
release. BuildKit (via buildx) is the replacement.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
Erich Blume 2026-02-10 21:02:19 -08:00
commit f40cec47da
3 changed files with 2 additions and 7 deletions

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Switch CI container builds from deprecated `docker build` to `docker buildx build` (BuildKit).