Update cd.yml to cache npm dependencies

.github/workflows/cd.yml

@@ -19,15 +19,13 @@ jobs:
         with:
           ssh-private-key: ${{ secrets.SSH_PRIVATE_KEY }}
 
-      - name: Install npm, astro & build
-        run: |
-          curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.3/install.sh | bash
-          source ~/.bashrc 
-          export NVM_DIR="$HOME/.nvm"
-          [ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"  # This loads nvm
-          nvm install node
-          npm install
-          node --run build
+      - name: install/cache dependencies and build
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 20
+          cache: 'npm'
+      - run: npm ci
+      - run: node --run build
 
       - name: Scan the host key
         run: mkdir -p ~/.ssh/ && ssh-keyscan -H $DEPLOY_SERVER >> ~/.ssh/known_hosts