lista.html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>VUE js V2 Listas | Device 4 Code</title>
</head>
<body>
  
  <div id="main">
    <ul>
      <li v-for="item in people" v-text="item"></li>
    </ul>
    <input type="text" v-model="name" v-on:keyup.enter="addName">
  </div>


  <script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.6.2/vue.js"></script>
  
  <script type="text/javascript">
    new Vue({
      el: '#main',
      data: {
        people: ['Roger', 'André', 'Eduardo', 'Ricardo']
      },
      methods: {
        addName: function() {
          this.people.push(this.name);
          this.name = '';
        }
      }
    });
  </script>
</body>
</html>