update workflow

.github/workflows/deploy.yml

@@ -13,8 +13,14 @@ jobs:
       - name: checkout repo
         uses: actions/checkout@v4
 
+      - name: install nix
+        uses: DeterminateSystems/nix-installer-action@main
+        
       - name: build site
-        uses: withastro/action@v4
+        run: |
+          nix-shell -p "nodejs_22" --run "npm install"
+          nix-shell -p "nodejs_22" --run "npm run build"
+          ls -la
 
       - name: upload site
         uses: actions/upload-artifact@v4