Add backup and restore script for ShopDB databases

[Baranotik15]

No description provided.

[mateacademy-ai-mentor]

Review Summary

Your task.sh script correctly implements all required functionality. The script properly reads DB_USER and DB_PASSWORD from environment variables, creates a full backup of ShopDB and restores it to ShopDBReserve, and creates a data-only backup (excluding schema) to ShopDBDevelopment using the --no-create-info flag. All checklist items are satisfied: the script uses mysqldump for backup operations, connects with the provided credentials via -u and -p flags, and is designed for cron job execution without requiring arguments. No critical issues were identified.

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