Fonts : 404 not found, in production environment

On Laravel 5.8 I have my fonts set in my public/fonts folder and use them in my .scss

@font-face {
   font-family: 'HelveticaNeue";
   src:url("fonts/HelveticaNeue.otf") format("opentype"),
       url('fonts/HelveticaNeue.woff') format('woff');
}

The development environment shows the fonts correctly, but my Azure web app doesn't and displays a 404 Not Found.

The configuration of the server sets the root folder as /public and npm run prod as been used to generate the .css file in /public/css/app.css.

website.com/css/app.css can be used to access the css but website.com/fonts/fontname.extension throws a 404 in the network tab and the following message:

The resource you are looking for has been removed, had its name changed, or is temporarily unavailable.

What am I missing that does not allow the css to find the font I'm using ?

via Chebli Mohamed