[Snyk] Security upgrade ruby from 3.0-alpine to 3.4.4-alpine

[officialmofabs]

Snyk has created this PR to fix 2 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):

• samples/server/petstore/ruby-sinatra/Dockerfile

We recommend upgrading to ruby:3.4.4-alpine, 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
	Out-of-bounds Write SNYK-ALPINE316-BUSYBOX-6913410	514
	Out-of-bounds Write SNYK-ALPINE316-BUSYBOX-6913410	514
	CVE-2025-26519 SNYK-ALPINE316-MUSL-8720632	364
	CVE-2025-26519 SNYK-ALPINE316-MUSL-8720632	364

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Summary by Sourcery

Upgrade the Docker base image for the sample Ruby Sinatra service to ruby:3.4.4-alpine to address security vulnerabilities

Bug Fixes:

• Fix multiple medium- and low-severity vulnerabilities by upgrading the Ruby Alpine base image from 3.0-alpine to 3.4.4-alpine

Enhancements:

• Update the sample Ruby Sinatra Dockerfile to use Ruby 3.4.4-alpine in both build and runtime stages

[sourcery-ai]

Reviewer's Guide

This PR updates the project’s Dockerfile to use the latest Ruby Alpine image (3.4.4-alpine) in both build and runtime stages, eliminating known security vulnerabilities in the previous base image.

File-Level Changes

Change	Details	Files
Upgrade Docker base image version	Bump build-stage image from ruby:3.0-alpine to ruby:3.4.4-alpine Bump runtime-stage image from ruby:3.0-alpine to ruby:3.4.4-alpine	samples/server/petstore/ruby-sinatra/Dockerfile

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