Complete Node.js container implementation with multi-version support

- Add Dockerfile with AlmaLinux 9 base, Nginx reverse proxy, and PM2
- Support Node.js versions 18, 20, 22 with automated installation
- Implement memory-optimized configuration (256MB minimum, 512MB recommended)
- Add Memcached session storage for development environments
- Create comprehensive documentation (README, USER-GUIDE, MEMORY-GUIDE, CLAUDE.md)
- Include example applications (simple website and REST API)
- Add Gitea CI/CD pipeline for automated multi-version builds
- Provide local development script with helper utilities
- Implement health monitoring, log rotation, and backup systems

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

Co-Authored-By: Claude <noreply@anthropic.com>

scripts/backup.sh

@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+
+USER=$1
+BACKUP_DIR="/home/$USER/_backups"
+DATE=$(date +%Y%m%d_%H%M%S)
+
+# Create backup directory if it doesn't exist
+mkdir -p $BACKUP_DIR
+
+# Backup application files
+tar -czf $BACKUP_DIR/app_backup_$DATE.tar.gz -C /home/$USER app/
+
+# Keep only last 10 backups
+cd $BACKUP_DIR
+ls -t app_backup_*.tar.gz | tail -n +11 | xargs -r rm
+
+echo "Backup completed: app_backup_$DATE.tar.gz"