I think you’ve mixed up a few things.
- There shouldn’t be front matter in a layout template https://github.com/ValentinChevoleau/ValentinHUGOLEARN/blob/master/themes/perso/layouts/nous.html
- You need something in the
/content
directory which uses thenous.html
page layout. To do this, you’ll need to settype = nous
in the front matter. - I’m pretty sure you need to put your
nous.html
layout (with front matter removed) in either theblog
or_default
directory.
See Are sections used for layout lookup when a page has a custom content type? for some helpful pointers (and there’s other threads on this topic to be found too.)