How to use a specific template for index.jinja2

Hi, I would like to modify the index.html / index.jinja2 : With for example "add a logo on the top of my page".

How can I use specific template using pytest-html ?

Same of : https://github.com/pytest-dev/pytest-html/issues/730 
How can I use  jinja inherit-type functionality?

Thanks !

Kasimashi
