nodejs: npm with grunt

Gruntfile.js

'use strict';
module.exports = function(grunt) {

  grunt.initConfig({
    jshint: {
      options: {
        jshintrc: '.jshintrc'
      },
      all: [
        'Gruntfile.js',
        'assets/js/*.js',
        'assets/js/plugins/*.js',
        '!assets/js/main.min.js'
      ]
    },
    recess: {
      dist: {
        options: {
          compile: true,
          compress: true
        },
        files: {
          'assets/css/main.min.css': [
            'assets/less/main.less'
          ]
        }
      }
    },
    uglify: {
      dist: {
        files: {
          'assets/js/main.min.js': [
            'assets/js/plugins/*.js',
            'assets/js/_*.js'
          ]
        }
      }
    },
    watch: {
      less: {
        files: [
          'assets/less/*.less'
        ],
        tasks: ['recess']
      },
      js: {
        files: [
          '<%= jshint.all %>'
        ],
        tasks: ['uglify']
      }
    },
    clean: {
      dist: [
        'assets/css/main.min.css',
        'assets/js/main.min.js'
      ]
    }
  });

  // Load tasks
  grunt.loadNpmTasks('grunt-contrib-clean');
  grunt.loadNpmTasks('grunt-contrib-jshint');
  grunt.loadNpmTasks('grunt-contrib-uglify');
  grunt.loadNpmTasks('grunt-contrib-watch');
  grunt.loadNpmTasks('grunt-recess');

  // Register tasks
  grunt.registerTask('default', [
    'clean',
    'recess',
    'uglify'
  ]);
  grunt.registerTask('dev', [
    'watch'
  ]);
};

package.json

{
  // ...
  "engines": {
    "node": ">= 0.10.0"
  },
  "devDependencies": {
    "grunt": "~0.4.1",
    "grunt-contrib-clean": "~0.5.0",
    "grunt-contrib-jshint": "~0.6.3",
    "grunt-contrib-uglify": "~0.2.2",
    "grunt-contrib-watch": "~0.5.2",
    "grunt-recess": "~0.3.5"
  }
}