build: use `node:18.20-alpine3.19 in Docker

[aloisklink]

📑 Summary

Chromium 128.0.6613.84-r0 (used in Alpine 3.20) seems to be having issues with puppeteer/mermaid-cli (especially in GitHub Actions), so we can't use it yet.

See: 294af9f

Resolves #762

📏 Design Decisions

N/A

📋 Tasks

Make sure you

• 📖 have read the contribution guidelines
• 💻 have added unit/e2e tests (if appropriate)
  • I believe we already have E2E tests that cover this, e.g. https://github.com/mermaid-js/mermaid-cli/actions/runs/11211689722/job/31161097388 and

    mermaid-cli/.github/workflows/release-publish.yml

    Lines 93 to 96 in 082fd7f

    	- name: Post deployment tests
    	run: |
    	for i in $(ls test-positive/*.mmd); do docker run -v $(pwd):/data ${{env.DOCKER_IO_REPOSITORY}}:${{env.RELEASE_VERSION}} -i /data/$i; done
    	for i in $(ls test-positive/*.mmd); do cat $i | docker run -i -v $(pwd):/data ${{env.DOCKER_IO_REPOSITORY}}:${{env.RELEASE_VERSION}} -o /data/$i-stdin.svg; done

• 🔖 targeted master branch

[aloisklink]

Hey @MindaugasLaganeckas, I'm going to merge this now (even without a review) since I want to make a 11.3.0 release, and this should fix the Docker image for the release! I hope you don't mind.