Backup and restore for custom forms

I would like to know in detail the procedure for backup and recovery for ERPNEXT version 11.1.21.
Please share your customization experience.
Operating system Ubuntu 16.04.5 LTS.
Interested in restoring custom settings on another empty server, and crontab tasks.
Sincerely, Andjeia.

For Database backup::point_down:

For Customization or Custom App Code Backup, you can use Git :point_down:

Also Other links::point_down: