fix: add OpenNext build step to generate worker.js

Co-Authored-By: Nathan Clevenger <nateclev@gmail.com>

Author: devin-ai-integration[bot]

.github/workflows/cloudflare-deploy.yml

@@ -37,6 +37,9 @@ jobs:
       - name: Build
         run: pnpm run build
 
+      - name: Build with OpenNext
+        run: npx open-next build
+        
       - name: Deploy with Wrangler
         run: npx wrangler deploy
         env: