added homepage, about, contact apps to installed apps in settings.py

nishaespera_music/nishaespera_music/settings.py

@@ -35,6 +35,9 @@ ALLOWED_HOSTS = []
 # Application definition
 
 INSTALLED_APPS = [
+    'homepage.apps.HomepageConfig',
+    'about.apps.AboutConfig',
+    'contact.apps.ContactConfig',
     'django.contrib.admin',
     'django.contrib.auth',
     'django.contrib.contenttypes',