Add backup automation

[soobinrho]

• Make a backup every day or every week. One system for K8s persistent volumes; another system for Docker Compose named volumes.
• Encrypt the backups.
• Make cronjob and bash scripts. Alternatively, use an existing program that already does the job.

[soobinrho]

• Encryption will be done using gpg. Example:

  
  # Encrypt
  gpg -e <filename>

Decrypt

gpg

Now, we'll be focusing on the automation of these processes.

[soobinrho]

• Consider rsync

Note: https://news.ycombinator.com/item?id=34197837