kaniko's scratch image has no /tmp; the build script and act's
RUNNER_TEMP both assume it exists.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
act starts job containers with entrypoint /bin/sleep, which kaniko's
scratch-based image lacks (busybox lives under /busybox). kaniko-act
adds the single missing symlink; bootstrap build is manual, documented
in the Dockerfile.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
mikkeli