create whitehall backup location on backup storage drive
create whitehall backup location on backup storage drive

we create the /data/backups/whitehall directory for `env-sync-and-backup` to store the whitehall backups on the backup storage drive rather than the small primary drive of backup machine.

alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet