Hi!
I believe there is an error generating the path to the 'all.css' file. A '/' is being placed at the very beginning, and this is not allowing it to be properly loaded into index.html.
Result after build documentation:
<link rel="stylesheet" type="text/css" href="/all.css" media="all" />
Expected result:
<link rel="stylesheet" type="text/css" href="all.css" media="all" />