old_contents: from rest_framework.decorators import api_view
  from rest_framework.response import Response
  from rest_framework.reverse import reverse
  
  @api_view(['GET'])
  def api_root(request, format=None):
      return Response({
          'roles': reverse('role-list', request=request, format=format),
          'users': reverse('user-list', request=request, format=format),
          'keys': reverse('key-list', request=request, format=format),
          #'nodes': reverse('node-list', request=request, format=format),
          'sites': reverse('site-list', request=request, format=format),
          'deploymentNetworks': reverse('deploymentnetwork-list', request=request, format=format),
          'slices': reverse('slice-list', request=request, format=format)
          'images': reverse('image-list', request=request, format=format),
          'flavors': reverse('flavor-list', request=request, format=format),
      })
  
new_contents: from rest_framework.decorators import api_view
  from rest_framework.response import Response
  from rest_framework.reverse import reverse
  
  @api_view(['GET'])
  def api_root(request, format=None):
      return Response({
          'roles': reverse('role-list', request=request, format=format),
          'users': reverse('user-list', request=request, format=format),
          'keys': reverse('key-list', request=request, format=format),
          #'nodes': reverse('node-list', request=request, format=format),
          'sites': reverse('site-list', request=request, format=format),
          'deploymentNetworks': reverse('deploymentnetwork-list', request=request, format=format),
          'slices': reverse('slice-list', request=request, format=format),
          'images': reverse('image-list', request=request, format=format),
          'flavors': reverse('flavor-list', request=request, format=format),
      })
  
subject: fix bug