feat: add Node.js setup to static workflow

- Introduced Node.js setup step in the GitHub Actions workflow to ensure the correct Node.js version (24) is used for builds.
- Enabled npm caching to optimize build performance.

Author: ctrl-escp

.github/workflows/static.yml

@@ -31,6 +31,11 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v4
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 24
+          cache: npm
       - name: Setup Pages
         uses: actions/configure-pages@v5
       - name: Build site