use example.com as the default BASE_URL

wagtail/project_template/project_name/settings/base.py

@@ -30,7 +30,7 @@ ALLOWED_HOSTS = []
 
 # Base URL to use when referring to full URLs within the Wagtail admin backend -
 # e.g. in notification emails. Don't include '/admin' or a trailing slash
-BASE_URL = 'http://localhost:8000'
+BASE_URL = 'http://example.com'
 
 
 # Application definition