Use Correct Docker Commands for Swarm Configuration

[hipnologo]

The command docker swarm inspect used in the backup_swarm_config method is invalid and causes an error. This prevents the script from successfully backing up the Docker Swarm configuration.

Proposed Solution:
• Replace Invalid Command:
• Use docker info --format '{{json .Swarm}}' to retrieve the Swarm configuration in JSON format.
• Update Swarm Backup Logic:
• Ensure the retrieved configuration is saved correctly in the backup files.

Tasks:
• Update the backup_swarm_config method with the correct Docker command.
• Adjust any parsing or file-writing logic as needed for the new command output.
• Test the updated method to verify that the Swarm configuration is backed up properly.