Enable GitHub Pages deployment in existing CI workflow

[Copilot]

This updates repository configuration so pushes to main can publish the built Astro site to GitHub Pages. The existing CI workflow is extended with a Pages deployment stage while preserving current build/check behavior.

• Workflow-level Pages controls

  • Added workflow permissions baseline (contents: read).
  • Added Pages-specific concurrency group to avoid cross-workflow collisions:
    • group: ${{ github.workflow }}-pages
    • cancel-in-progress: false

• New deploy job (push-only)

  • Added deploy job to .github/workflows/actions.yaml.
  • Runs only on push events and depends on build + check.
  • Grants only required deployment permissions at job scope (pages: write, id-token: write).
  • Builds dist, uploads it as Pages artifact, and deploys via official Pages actions.

deploy:
  if: github.event_name == 'push'
  needs: [build, check]
  permissions:
    pages: write
    id-token: write
  environment:
    name: github-pages
    url: ${{ steps.deployment.outputs.page_url }}
  steps:
    - uses: actions/configure-pages@v5
    - uses: actions/upload-pages-artifact@v3
      with:
        path: ./dist
    - id: deployment
      uses: actions/deploy-pages@v4

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:

• plus.unsplash.com
  • Triggering command: /home/REDACTED/work/_temp/ghcca-node/node/bin/node node /home/REDACTED/work/hdspgroup.github.io/hdspgroup.github.io/node_modules/.bin/astro build (dns block)
• telemetry.astro.build
  • Triggering command: /home/REDACTED/work/_temp/ghcca-node/node/bin/node node /home/REDACTED/work/hdspgroup.github.io/hdspgroup.github.io/node_modules/.bin/astro build (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)

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