Remove all migration files and unused CSS files from the project.

devart/settings.py

@@ -45,6 +45,7 @@ INSTALLED_APPS = [
     'django.contrib.messages',
     'django.contrib.staticfiles',
 
+    'core',
     'courses',
     'users',
 ]
@@ -75,6 +76,7 @@ TEMPLATES = [
                 'django.contrib.auth.context_processors.auth',
                 'django.contrib.messages.context_processors.messages',
                 
+                'core.context_processor.site_settings',
                 'courses.context_processors.course_list',
             ],
         },