am 6d8e4fd8: am b83a283a: docs: add dev guide for backup

Merge commit '6d8e4fd83bb7f4eabc942dd17fa229cf9baf5fcf' into kraken

* commit '6d8e4fd83bb7f4eabc942dd17fa229cf9baf5fcf':
  docs: add dev guide for backup