old_contents: from django.urls import path
  
  from qr_code import views
  
  
  app_name = 'qr_code'
  urlpatterns = [
      path('images/serve-qr-code-image/', views.serve_qr_code_image, name='serve_qr_code_image')
  ]
  
new_contents: from django.conf import settings
  from django.urls import path
  
  from qr_code import views
  
  
  app_name = 'qr_code'
  urlpatterns = [
      path(getattr(settings, 'SERVE_QR_CODE_IMAGE_PATH', 'images/serve-qr-code-image/'), views.serve_qr_code_image, name='serve_qr_code_image')
  ]
  
subject: Introduce setting `SERVE_QR_CODE_IMAGE_PATH` to configure the path under which QR Code images are served.