Enhance GitHub Actions workflow by adding Node.js setup and improving dependency installation logic

Author: marci

.github/workflows/deploy-site.yaml

@@ -42,8 +42,18 @@ jobs:
       - name: Setup Pages
         id: pages
         uses: actions/configure-pages@v5
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: "20"
+          cache: "npm"
       - name: Install Node.js dependencies
-        run: "[[ -f package-lock.json || -f npm-shrinkwrap.json ]] && npm ci || true"
+        run: |
+          if [[ -f package-lock.json || -f npm-shrinkwrap.json ]]; then
+            npm ci
+          elif [[ -f package.json ]]; then
+            npm install
+          fi
       - name: Cache Restore
         id: cache-restore
         uses: actions/cache/restore@v4