ci: add deploy step

.github/workflows/ci.yml

@@ -137,3 +137,32 @@ jobs:
         run: npm ci
       - name: Run unit tests
         run: npm run test:ci
+  deploy:
+    name: Deploy to Cloudflare Pages
+    runs-on: ubuntu-latest
+    needs: [build]
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Download artifacts
+        uses: actions/download-artifact@v4
+        with:
+          name: www
+          path: www
+      - name: Deploy to Cloudflare Pages
+        uses: cloudflare/pages-action@v1
+        id: cloudflare-deployment
+        with:
+          apiToken: ${{ secrets.CLOUDFLARE_API_TOKEN }}
+          accountId: ${{ secrets.CLOUDFLARE_ACCOUNT_ID }}
+          projectName: ${{ vars.CLOUDFLARE_PROJECT_NAME }}
+          directory: www
+      - name: Comment the preview url
+        if: github.event_name == 'pull_request'
+        uses: peter-evans/create-or-update-comment@v3
+        with:
+          issue-number: ${{ github.event.number }}
+          body: |
+            Deploy preview available at: ${{ steps.cloudflare-deployment.outputs.url }}
+
+            Built with commit ${{ github.event.pull_request.head.sha }}.