How to reproduce it :

• in ametys.css add font-awesome like this

  @font-face {
    font-family: 'FontAwesome';
    src: url("../fonts/fontAwesome/fontawesome-webfont.eot?v=4.7.0");
    src: url("../fonts/fontAwesome/fontawesome-webfont.eot?#iefix&v=4.7.0") format("embedded-opentype"), url("../fonts/fontAwesome/fontawesome-webfont.woff2?v=4.7.0") format("woff2"), url("../fonts/fontAwesome/fontawesome-webfont.woff?v=4.7.0") format("woff"), url("../fonts/fontAwesome/fontawesome-webfont.ttf?v=4.7.0") format("truetype"), url("../fonts/fontAwesome/fontawesome-webfont.svg?v=4.7.0#fontawesomeregular") format("svg");
    font-weight: normal;
    font-style: normal; }

• In the folder font/ put a fontAwesome zip content