Fontawesome is not working when project is built with grunt

I had the same problem. The following code solved my problem.

copy: {
    dist: {
        files: [{
            expand: true,
            dot: true,
            cwd: '<%= config.app %>',
            dest: '<%= config.dist %>',
            src: [
                '*.{ico,png,txt}',
                '.htaccess',
                'images/{,*/}*.webp',
                '{,*/}*.html',
                'styles/fonts/{,*/}*.*'
            ]
        },{
            expand: true,
            dot: true,
            cwd: 'bower_components/bootstrap/dist', // change this for font-awesome
            src: ['fonts/*.*'],
            dest: '<%= config.dist %>'
        }]
    }
}