Grunt configuration

gruntfile.js

module.exports = function (grunt) {
    grunt.initConfig({
        modernizr: {
            devFile: "remote",
            outputFile: "web/_static/js/modernizr.js",
            files: ["web/js/*", "web/css/*"]
        },

        jshint: {
            options: {
                reporter: require('jshint-stylish')
            },
            all: [
                'Gruntfile.js',
                'web/js/*'
            ]
        },

        uglify: {
            options: {
                report: 'min',
                banner: '/*! <%= grunt.template.today("yyyy-mm-dd") %> */\n'
            },
            build: {
                files: {
                    'web/_static/js/app.min.js': [
                        'web/vendor/jquery/jquery.js',
                        'web/js/app.js'
                    ]
                }
            }
        },

        cssmin: {
            options: {
                report: 'min',
                root: 'web',
                target: 'web'
            },
            build: {
                files: {
                    'web/_static/css/style.min.css': ['web/vendor/bootstrap/docs/assets/css/bootstrap.css']
                }
            }
        },

        watch: {
            scripts: {
                files: ["web/js/*", "web/css/*"],
                tasks: ['jshint', 'uglify', 'cssmin']
            }
        },

        clean: ['web/_static/*']
    });

    grunt.loadNpmTasks("grunt-modernizr");
    grunt.loadNpmTasks('grunt-contrib-jshint');
    grunt.loadNpmTasks('grunt-contrib-uglify');
    grunt.loadNpmTasks('grunt-contrib-cssmin');
    grunt.loadNpmTasks('grunt-contrib-watch');
    grunt.loadNpmTasks('grunt-contrib-clean');

    grunt.registerTask('default', ['jshint', 'uglify', 'cssmin']);
    grunt.registerTask('production', ['clean', 'jshint', 'uglify', 'cssmin', 'modernizr']);
};

package.json

{
  "name": "grunttest",
  "devDependencies": {
    "grunt": "~0.4.2",
    "grunt-contrib-jshint": "~0.6.3",
    "jshint-stylish": "~0.1.4",
    "grunt-contrib-uglify": "~0.2.2",
    "grunt-contrib-cssmin": "~0.7.0",
    "grunt-contrib-watch": "~0.5.3",
    "grunt-modernizr": "~0.4.1",
    "grunt-contrib-clean": "~0.5.0"
  }
}