Remove obsolete deployment files - Coolify handles deployment

- Removed deploy.sh (manual deployment script not needed)
- Removed deploy_key.pub (SSH keys managed by Coolify)
- Added deploy files to .gitignore for security
- Deployment now handled via Coolify webhooks

.gitignore

@@ -9,3 +9,7 @@ yarn-error.log*
 .vscode/
 .idea/
 deploy_key
+
+# Deployment keys and scripts
+deploy_key*
+deploy.sh