[Snyk] Security upgrade alpine from latest to 3.23.3

[TricentisDevOps]

Snyk has created this PR to fix 0 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):

• Dockerfile

We recommend upgrading to alpine:3.23.3, as this image has only 0 known vulnerabilities. To do this, merge this pull request, then verify your application still works as expected.

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[TricentisDevOps]

This change pins the base image from the floating latest tag to a specific patch version, 3.23.3. This is a recommended practice for ensuring reproducible builds.

Version 3.23.3 is a recent patch release containing security fixes. The underlying 3.23 series introduced an updated package manager (apk-tools v3), but this is not expected to break typical container builds. [1, 8]

Source: Alpine Linux Releases

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