add lighthouse ci

Author: ShubhamOulkar

.github/workflows/lighthouse.yml

@@ -0,0 +1,104 @@
+name: Lighthouse Audit
+
+on:
+  pull_request_target:
+    types: [opened, synchronize]
+
+permissions:
+  contents: read
+  pull-requests: write  # 🔑 Required to post PR comment
+
+jobs:
+  lighthouse:
+    if: github.actor != 'dependabot[bot]'
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: ⬇️ Checkout code
+        uses: actions/checkout@v4
+        with:
+          ref: ${{ github.event.pull_request.head.ref }}
+          repository: ${{ github.event.pull_request.head.repo.full_name }}
+
+      - name: ⏳ Wait for Netlify preview to be live
+        run: |
+          PREVIEW_URL="https://deploy-preview-${{ github.event.pull_request.number }}--expressjscom-preview.netlify.app"
+          echo "PREVIEW_URL=$PREVIEW_URL" >> "$GITHUB_ENV"
+          for i in {1..3}; do
+            if curl -s --head "$PREVIEW_URL" | grep "200 OK" > /dev/null; then
+              echo "Preview is live!"
+              break
+            fi
+            echo "Waiting for Netlify to deploy... ($i/3)"
+            sleep 10
+          done
+
+      - name: 🕵️ Run Lighthouse audits
+        run: |
+          npm install -g lighthouse
+          mkdir lighthouse-report
+          URLS=(
+            "$PREVIEW_URL"
+            "$PREVIEW_URL/en/blog/posts.html"
+            "$PREVIEW_URL/en/support/"
+            "$PREVIEW_URL/en/resources/glossary.html"
+            "$PREVIEW_URL/en/5x/api.html"
+          )
+          for url in "${URLS[@]}"; do
+            name=$(echo "$url" | sed 's|https://||;s|[/.]|_|g')
+            lighthouse "$url" \
+              --output json \
+              --output-path="./lighthouse-report/$name.report.json" \
+              --chrome-flags="--headless"
+          done
+
+      - name: 📦 Upload artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: lighthouse-report
+          path: lighthouse-report/
+
+      - name: 📝 Summarize results and comment
+        uses: actions/github-script@v7
+        env:
+          PREVIEW_URL: ${{ env.PREVIEW_URL }}
+        with:
+          script: |
+            const fs = require('fs');
+            const path = require('path');
+
+            const files = fs.readdirSync('./lighthouse-report');
+            const rows = [];
+
+            for (const file of files) {
+              const report = JSON.parse(fs.readFileSync(path.join('./lighthouse-report', file), 'utf8'));
+              const url = report.finalUrl;
+              const scores = {
+                performance: Math.round(report.categories.performance.score * 100),
+                accessibility: Math.round(report.categories.accessibility.score * 100),
+                bestPractices: Math.round(report.categories['best-practices'].score * 100),
+                seo: Math.round(report.categories.seo.score * 100),
+              };
+
+              rows.push(
+                `#### [${url}](${url})\n` +
+                '| Category | Score |\n' +
+                '|----------|-------|\n' +
+                `| ⚡ Performance | ${scores.performance} |\n` +
+                `| ♿ Accessibility | ${scores.accessibility} |\n` +
+                `| ✅ Best Practices | ${scores.bestPractices} |\n` +
+                `| 🔍 SEO | ${scores.seo} |\n`
+              );
+            }
+
+            const body = [
+              `### 🚦 Lighthouse Scores for Preview [Link](${process.env.PREVIEW_URL})`,
+              ...rows
+            ].join('\n\n');
+
+            github.rest.issues.createComment({
+              issue_number: context.payload.pull_request.number,
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              body
+            });