Make A Global Setting in Admin Panel For Front End In Django

Make A Global Setting in Admin Panel For Front End In Django.

There must be a setting tab in the side bar.

Example Setting:
toggle dark/light mode:

front end:

{% if globsetting.darkmode == 'on' %}
<div class='container dark-mode'></div>
{% else %}
<div class='container'></div>
{% endif %}

something like that, it's only my theory I really don't know if that's how will works in frontend.