Grunt - the javascript task runner

npm install -g grunt-cli
npm init
npm install grunt --save-dev
npm install grunt-contrib-uglify --save-dev

{
  "name": "example",
  "version": "0.0.0",
  "devDependencies": {
    "grunt": "x",
    "grunt-contrib-uglify": "x"
  }
}

module.exports = function (grunt) {
  grunt.initConfig({
    uglify: {
      build: {
        files: {
          'dist/scripts.js': ['components/jquery/jquery.js', 'components/bootstrap/docs/assets/js/bootstrap.js']
        }
      }
    }
  })
  grunt.loadNpmTasks('grunt-contrib-uglify')
  grunt.registerTask('default', ['uglify'])
}