Update cumulus/management/commands/syncstatic.py
Update cumulus/management/commands/syncstatic.py

options.get is not falling back to the default STATIC_CONTAINER when `container` is not passed as an argument. 
ferrix/django-cumulus,rizumu/django-cumulus,SmithsonianEnterprises/django-cumulus,bennylope/django-cumulus,django-cumulus/django-cumulus,absoludity/django-cumulus,SmithsonianEnterprises/django-cumulus,mandx/django-cumulus,elsmorian/django-cumulus,bennylope/django-cumulus,ImaginaryLandscape/django-cumulus,absoludity/django-cumulus,CoachLogix/django-cumulus,elsmorian/django-cumulus