You can get more information about how to secure the Bitnami MEAN stack in the
Secure MongoDB section from the previous guide I posted. I will paste the link below for future references
Regarding the auditing capabilities, we are shipping MongoDB Community version, and according to the link below it is only available for MongoDB Enterprise.
MongoDB Enterprise includes an auditing capability for
mongos instances. The auditing facility allows administrators and users to track system activity for deployments with multiple users and applications.
About how to backup and restore your MongoDB database, you can find more information in our guide at https://docs.bitnami.com/aws/infrastructure/mean/administration/backup-restore-mongodb/
Apart from that, could you please give us more information about your latest question?