[Snyk] Security upgrade alpine from 3.21.2 to 3.21.3

[snyk-io]

Snyk has created this PR to fix 3 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):

• range2cidr/Dockerfile

We recommend upgrading to alpine:3.21.3, 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	54
	CVE-2025-26519 SNYK-ALPINE321-MUSL-8720634	54
	CVE-2024-13176 SNYK-ALPINE321-OPENSSL-8690014	54
	CVE-2024-13176 SNYK-ALPINE321-OPENSSL-8690014	54
	CVE-2024-12797 SNYK-ALPINE321-OPENSSL-8710358	54

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Summary by Sourcery

Bug Fixes:

• Bump Alpine from 3.21.2 to 3.21.3 to resolve CVE-2025-26519, CVE-2024-13176 and CVE-2024-12797 in musl and OpenSSL

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[sourcery-ai]

Reviewer's Guide

Bumps the Dockerfile’s base image from alpine:3.21.2 to alpine:3.21.3 to incorporate security fixes and eliminate known vulnerabilities.

File-Level Changes

Change	Details	Files
Updated Docker base image version	Replaced alpine:3.21.2 with alpine:3.21.3 in the FROM directive	range2cidr/Dockerfile

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[snyk-io]

🎉 Snyk checks have passed. No issues have been found so far.

✅ security/snyk check is complete. No issues have been found. (View Details)