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+The purpose of this script is to backup the contents of Docker container-based database (either PostgreSQL or MariaDB) to a local 'dump' file (SQL format), which is then compressed to conserve disk space. 
+
+The system is designed to be run regularly (perhaps hourly, or daily) via cron, and to keep a pre-determined (via configuration) number of past, deleting excess backup files to conserve disk space.