añado static to urlpatterns

src/mysite/urls.py

@@ -21,3 +21,6 @@ urlpatterns = [
     path('polls/', include("polls.urls")),
     path('admin/', admin.site.urls),
 ]
+
+urlpatterns += static(settings.STATIC_URL, document_root=settings.STATIC_ROOT)
+urlpatterns += static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)