title: grunt-serve doesn't serve index.html with '/' request
body: <p>I have a problem getting a local server with grunt-serve task to behave like a normal server should. My <code>grunt.initConfig</code> object is like follows:</p>
  
  <pre><code>  grunt.initConfig({
      'serve': {
        'path': '/Users/honkdonky/Desktop/testspace/angular',
        },
        'options': {
          'port': '9999'
        }
      }
    });
  </code></pre>
  
  <p>but when I request this link:</p>
  
  <p><a href="http://localhost:9999/" rel="nofollow">http://localhost:9999/</a></p>
  
  <p>index.html there is not rendered. Instead what I see is a list of available files. The project should route requests to '/' by rendering index.html and routing as configured in angularjs module. Configuration of which is as follows:</p>
  
  <pre><code>phoneApp.config(['$routeProvider',
      function($routeProvider) {
          $routeProvider.
              when('/phones', {
                  templateUrl: 'phone-list.html',
                  controller: 'PhoneListCtrl'
              }).
              when('/phones/:phoneId', {
                  templateUrl: 'phone-detail.html',
                  controller: 'PhoneDetailCtrl'
              }).
              otherwise({
                  redirectTo: '/phones'
              });
      }
  ]);
  </code></pre>