i recommand you no to delete the folder squelettes-dist. The files in that folder are the default template for the usual pages (sommaire.html, article.html, backend.html ...)
You can override these templates by adding your own in the folder squelettes. (sommaire.html, article.html, ...)
If you’re overriding all the pages (make sure you havent forgotten anything), you may delete the squelettes-dist but it’s a bit useless.
