Improve CI: upgrade to Node 20, fix Rollup dependency issues

Author: JavaZeroo

.github/workflows/deploy.yml

@@ -21,11 +21,20 @@ jobs:
     - name: Setup Node.js
       uses: actions/setup-node@v4
       with:
-        node-version: '18'
+        node-version: '20'
         cache: 'npm'
 
-    - name: Install dependencies
-      run: npm ci || npm install
+    - name: Clean install dependencies
+      run: |
+        # Clear npm cache and remove existing files
+        npm cache clean --force
+        rm -rf node_modules package-lock.json
+        
+        # Install dependencies fresh
+        npm install
+        
+        # Verify rollup is properly installed
+        npx rollup --version
 
     - name: Build
       run: npm run build