Use docker/login-action + buildx for reliable registry auth

Fixkamo-internal
Shipped
April 1, 2026 at 8:50 PM UTC
Author
kamo
Commit
da855e9

Replace bare docker login/build/push with the docker/login-action@v3, docker/setup-buildx-action@v3, and docker/build-push-action@v5 pattern that handles credential persistence properly. Fixes intermittent "no basic auth credentials" failures during image push.

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