Gruntfile for express and livereload

Gruntfile.js

module.exports = function(grunt) {
  	// load all grunt tasks
    require('load-grunt-tasks')(grunt);
  
	// Configure Grunt 
	grunt.initConfig({
		//it will allow to run nodemon and watch at the same time 
		concurrent: {
		  dev: {
		    tasks: ['nodemon', 'watch'], 
		    options: {
		      logConcurrentOutput: true
		    }
		  }
		},
		compass: {
		    dev: {
		    	config:'config.rb'
		    }
		},
		//configure nodemon to restart when files are changed
		nodemon: {
		  dev: {
		    script: 'app.js',
		    options: {
		    	ignore: ['node_modules/**'],
		  		ext: 'js,scss,css,handlebars,html',
			    nodeArgs: ['--debug'],
			    env: {
			    PORT: '3000'
		    },
		        // omit this property if you aren't serving HTML files and 
		        // don't want to open a browser tab on start
		        callback: function (nodemon) {
		        nodemon.on('log', function (event) {
		          console.log(event.colour);
		        });

		        // opens browser on initial server start
		        nodemon.on('config:update', function () {
		          // Delay before server listens on port
		          setTimeout(function() {
		            require('open')('http://localhost:3000');
		          }, 1000);
		        });

		        // refreshes browser when server reboots
		        nodemon.on('restart', function () {
		          // Delay before server listens on port
		          setTimeout(function() {
		            require('fs').writeFileSync('.grunt/rebooted', 'rebooted');
		          }, 1000);
		        });
		      }
		    }
		  }
		},
		watch: {
			//it must be used to run express before the livereload task 
			server: {
			    files: ['.grunt/rebooted'],
			    options: {
			      livereload: true
				}
			},
		    compass: {
		   		// These files are sent to the live reload server
		  		files: ['public/stylesheets/**/*.scss', 'public/stylesheets/*.scss'],
		    	tasks: ['compass'],
		    	livereload: true
		    },
		}
	});

	grunt.registerTask('default',['concurrent:dev']);
};

Package.json

{
  "name": "express-livereload",
  
  "dependencies": {
    "express": "*"
  },
  "devDependencies": {
    "load-grunt-tasks": "~0.3.0",
    "grunt": "~0.4.2",
    "grunt-contrib-watch": "~0.5.3",
    "grunt-contrib-jshint": "~0.8.0",
    "grunt-concurrent": "~0.4.3",
    "grunt-contrib-compass": "~0.7.1",
    "grunt-nodemon": "~0.2.0",
    "grunt-contrib-stylus": "~0.12.0",
    "grunt-open": "~0.2.3"
  }
}