I just explained it above @Robert_Elite 
You have to extend as in make your own file, copy it from the strapi-admin package, and change the name.
In your project it would be admin/src/index.html
I just explained it above @Robert_Elite 
You have to extend as in make your own file, copy it from the strapi-admin package, and change the name.
In your project it would be admin/src/index.html