Initial Lighthouse CI workflow file

.github/workflows/lighthouse.yml

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+name: Lighthouse CI
+on: [push]
+jobs:
+  lighthouse:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Use Node.js 18.x
+        uses: actions/setup-node@v3
+        with:
+          node-version: 18.x
+      - uses: ruby/setup-ruby@v1
+        with:
+          bundler-cache: true
+      - run: |
+          bundle install
+          bundle exec jekyll build
+      - name: run Lighthouse CI
+        run: |
+          npm install -g @lhci/[email protected]
+          lhci autorun
+      # - name: Audit URLs using Lighthouse
+      #   uses: treosh/lighthouse-ci-action@v10
+      #   with:
+      #     urls: |
+      #       https://example.com/
+      #       https://example.com/blog
+      #     budgetPath: ./budget.json # test performance budgets
+      #     configPath: ".github/lighthouse/lighthouserc.js"
+      #     uploadArtifacts: true # save results as an action artifacts
+      #     temporaryPublicStorage: true # upload lighthouse report to the temporary storage