Laravel has a public directory of where all assets are loaded. If you have files in your resources directory you need to copy them over to the public directory to actually use them
For example
mix.sass()
.scripts()
.webpack('app.js')
.copy('resources/assets/css/font/summernote.woff', 'public/font/summernote.woff');
Another option would be placing these files by default in your public directory.
For more info see: https://laravel.com/docs/5.5/mix#copying-files-and-directories


