index.html

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Livraria Flip</title>
    <link rel="manifest" href="./manifest.json">
    <meta name="theme-color" content="#3498db">
    <link rel="stylesheet" href="./dist/style.css">
  </head>
  <body>
    <div id="app"></div>
    <script src="./dist/build.js"></script>
    <script>
      if ('serviceWorker' in navigator) {
        navigator.serviceWorker.register('./sw.js')
        .then(function(reg) {
          // registration worked
          console.log('Registration succeeded. Scope is ' + reg.scope);
        }).catch(function(error) {
          // registration failed
          console.log('Registration failed with ' + error);
        });
      }
  </script>
  </body>
</html>