fix: Include startup.sh in deployment artifact

The GitHub workflow was not copying the startup.sh file to production,
which is why the other agent couldn't see it. This ensures:
- startup.sh is included in the deployment
- PM2 can properly use the startup script for auto-rebuilding

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: Wal33D

.github/workflows/node.js.yml

@@ -30,6 +30,7 @@ jobs:
           path: |
             dist
             ecosystem.config.js
+            startup.sh
             package.json
             package-lock.json