Update README.md

README.md

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-# proxmox-snapshot-rotation
+The script does the following:
 
+1. Comprehensive Logging System:
+- Dedicated log directory and rotation
+- Configurable log file size limits
+- Different log levels (INFO, WARN, ERROR)
+- Verbose mode option
+- Log rotation when size limit is reached
+
+2. Robust Error Handling:
+- Error codes for different failure scenarios
+- Detailed error messages with timestamps
+- Temporary file handling for error capture
+- Proper cleanup of temporary files
+- Error handling for all critical operations
+
+3. Process Management:
+- Lock file mechanism to prevent multiple instances
+- Proper cleanup of lock file using trap
+- Stale lock detection and cleanup
+
+4. Input Validation:
+- Parameter validation for numeric inputs
+- Better argument parsing
+- Clear help message with usage examples
+
+5. Safety Features:
+- Separate functions for snapshot creation and deletion
+- Better status checking and error reporting
+- Verbose logging option for debugging
+- Dry-run mode improvements
+
+6. Code Organization:
+- Modular function design
+- Clear separation of concerns
+- Constants and configuration at the top
+- Main function to orchestrate operations
+- Better variable naming and scope management
+
+To use the script:
+
+1. Save it to a location like `/usr/local/sbin/proxmox-snapshot-rotation.sh`
+2. Make it executable: `chmod +x /usr/local/sbin/proxmox-snapshot-rotation.sh`
+3. Create the log directory: `mkdir -p /var/log/proxmox-snapshots`
+
+You can run it with various options:
+```bash
+# Normal run
+./proxmox-snapshot-rotation.sh
+
+# Dry run with verbose output
+./proxmox-snapshot-rotation.sh --dry-run --verbose
+
+# Keep more snapshots and longer retention
+./proxmox-snapshot-rotation.sh --keep 48 --retain-days 14
+```
+
+The script will create detailed logs in `/var/log/proxmox-snapshots/` and handle various error conditions gracefully.