created urls.

widget_huli/Announcement_Board/admin.py

+from django.contrib import admin
+
+# Register your models here.

widget_huli/Announcement_Board/apps.py

+from django.apps import AppConfig
+
+
+class AnnouncementBoardConfig(AppConfig):
+    default_auto_field = 'django.db.models.BigAutoField'
+    name = 'Announcement_Board'

widget_huli/Announcement_Board/models.py

+from django.db import models
+
+# Create your models here.

widget_huli/Announcement_Board/tests.py

+from django.test import TestCase
+
+# Create your tests here.

widget_huli/Announcement_Board/urls.py

+from django.urls import path
+from .views import index
+
+urlpatterns = [
+    path('', index, name ='index'),
+]
+
+app_name = "Announcement_Board"

widget_huli/Announcement_Board/views.py

+from django.shortcuts import render
+
+# Create your views here.

widget_huli/widget_huli/settings.py

@@ -37,6 +37,7 @@ INSTALLED_APPS = [
     'django.contrib.sessions',
     'django.contrib.messages',
     'django.contrib.staticfiles',
+    'Announcement_Board',
 ]
 
 MIDDLEWARE = [

widget_huli/widget_huli/urls.py

@@ -14,8 +14,9 @@ Including another URLconf
     2. Add a URL to urlpatterns:  path('blog/', include('blog.urls'))
 """
 from django.contrib import admin
-from django.urls import path
+from django.urls import include, path
 
 urlpatterns = [
+    path('Announcement_Board/', include('Announcement_Board.urls', namespace="Announcement_Board" )),
     path('admin/', admin.site.urls),
 ]