My Gruntfile for Jekyll projects

Gruntfile.js

module.exports = function(grunt) {
  grunt.initConfig({
    pkg: grunt.file.readJSON('package.json'),
    concat: {
      options: {
        separator: ';'
      },
      dist: {
        src: [
          'assets/js/_src/modernizr.js',
          'assets/js/_src/jquery.js',
          'assets/js/_src/foundation.js',
          'assets/js/_src/app.js',
        ],
        dest: 'assets/js/_<%= pkg.name %>.js'
      }
    },
    uglify: {
      options: {
        banner: '/*! <%= pkg.name %> <%= grunt.template.today("dd-mm-yyyy") %> */\n'
      },
      dist: {
        files: {
          'assets/js/<%= pkg.name %>.min.js': ['<%= concat.dist.dest %>']
        }
      }
    }
  });

  grunt.loadNpmTasks('grunt-contrib-uglify');
  grunt.loadNpmTasks('grunt-contrib-concat');
  grunt.registerTask('default', ['concat', 'uglify']);
};