feat: Backup mongodb to S3

We currently only have volume snapshots for production mongodb backups, we should also have application level backups of the actual database itself. We should be able to emulate the back strategy used in Language Depot Lexbox, you can see the [CronJob here](https://github.com/sillsdev/languageforge-lexbox/blob/f450959c6cc42033e11ef55842b8151443bf7d37/deployment/production/backup.yaml)