Phaser 3 minimal HTML

<!DOCTYPE html>
<html lang="en">
  <head>
    <title>My Game</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <style>
      body{
        margin: auto;
        width: 50%;
        padding: 10px;
      }
    </style>

    <script src="https://cdnjs.cloudflare.com/ajax/libs/phaser/3.22.0/phaser.min.js"></script>
    <script src="main.js"></script>
  </head>
  <body>

  </body>
</html>