[Snyk] Security upgrade alpine from 3.21.0 to 3.21.5

[Somefive]

Snyk has created this PR to fix 4 vulnerabilities in the dockerfile dependencies of this project.

Keeping your Docker base image up-to-date means you’ll benefit from security fixes in the latest version of your chosen image.

Snyk changed the following file(s):

• cmd/apiserver/Dockerfile

We recommend upgrading to alpine:3.21.5, as this image has only 0 known vulnerabilities. To do this, merge this pull request, then verify your application still works as expected.

Vulnerabilities that will be fixed with an upgrade:

	Issue	Score
	CVE-2025-26519 SNYK-ALPINE321-MUSL-8720634	364
	CVE-2025-26519 SNYK-ALPINE321-MUSL-8720634	364
	CVE-2025-9230 SNYK-ALPINE321-OPENSSL-13174128	364
	CVE-2025-9231 SNYK-ALPINE321-OPENSSL-13174129	364
	CVE-2025-9232 SNYK-ALPINE321-OPENSSL-13174130	364

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Important

• Check the changes in this PR to ensure they won't cause issues with your project.
• Max score is 1000. Note that the real score may have changed since the PR was raised.
• This PR was automatically created by Snyk using the credentials of a real user.

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Summary by cubic

Upgraded the apiserver Docker base image to alpine 3.21.5 to fix musl and OpenSSL CVEs. No functional changes expected.

• Dependencies
  • Updated cmd/apiserver/Dockerfile: FROM alpine:3.21.0 → 3.21.5.
  • Snyk scan shows 0 known vulnerabilities for the new base image.

^{Written for commit 4a28513. Summary will update automatically on new commits.}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 84.10%. Comparing base (2ffce4c) to head (4a28513).

Additional details and impacted files

@@           Coverage Diff           @@
##           master      #64   +/-   ##
=======================================
  Coverage   84.10%   84.10%           
=======================================
  Files          36       36           
  Lines        1095     1095           
=======================================
  Hits          921      921           
  Misses        114      114           
  Partials       60       60           

Flag	Coverage Δ
unit-test	84.10% <ø> (ø)

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[cubic-dev-ai]

No issues found across 1 file