Upgrade Node.js to 22.x LTS and npm to 10.x with security updates

[Copilot]

This PR upgrades the SystemDS website project from Node.js 16.x to the latest LTS version 22.x, addressing the outdated Node.js version mentioned in the CONTRIBUTING.md file.

Changes Made

Node.js and npm Version Updates

• GitHub Actions: Updated .github/workflows/build.yml to use Node.js 22.x (from 16.x) and upgraded actions from v2 to v4
• Documentation: Updated README.md to recommend Node.js 22.x and npm 10.x (from 16.x and 8.x)
• Contributing Guide: Updated CONTRIBUTING.md to reflect the successful upgrade to Node.js 22.x LTS

Security Improvements

• Ran npm audit fix to address multiple security vulnerabilities
• Updated package-lock.json with latest compatible dependency versions
• Reduced vulnerabilities from 34 to 16 without breaking changes

Compatibility Testing

The upgrade has been thoroughly tested:

• ✅ gulp build - Static site generation works correctly
• ✅ gulp (development server) - BrowserSync and live reload functionality works
• ✅ Jekyll integration - All markdown files and assets compile successfully
• ✅ Sass compilation - CSS builds without errors
• ✅ JavaScript bundling - All scripts concatenate and minify properly

Background

Node.js 16.x reached end-of-life in April 2023, and the CONTRIBUTING.md file explicitly mentioned this needed to be addressed. Node.js 22.x is the current LTS version with active support until 2027, providing:

• Enhanced security features
• Better performance
• Long-term stability
• Up-to-date npm tooling (10.x)

This upgrade ensures the website build environment remains secure and maintainable while preserving all existing functionality.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• www.google.com
  • Triggering command: gulp (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

---

✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.