MindMap/backend/django_mindmap/urls.py

from django.contrib import admin
from django.urls import path, include
from django.conf import settings
from django.conf.urls.static import static
from django.views.generic import TemplateView

urlpatterns = [
    path('admin/', admin.site.urls),
    path('api/', include('mindmap.urls')),
    # Serve built frontend at root
    path('', TemplateView.as_view(template_name='index.html'), name='spa-index'),
] + static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)