Merge branch '6-improve-error-handling' into 'master'

Resolve "Improve error handling"

Closes #6

See merge request !3
2 jobs for 9-add-option-to-set-backup-flag-of-new-disk-images in 1 minute and 3 seconds (queued for 1 second)
Status Job ID Name Coverage
  Build
passed #29586
build

00:00:42

 
  Deploy
passed #29587
deploy-master

00:00:21