index.html

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>tekye audio watermark</title>

    <link
      rel="stylesheet"
      type="text/css"
      href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css"
    />
    <link
      rel="stylesheet"
      href="https://stackpath.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css"
    />
    <link
      rel="stylesheet"
      href="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-icons/1.10.4/font/bootstrap-icons.min.css"
      integrity="sha512-yU7+yXTc4VUanLSjkZq+buQN3afNA4j2ap/mxvdr440P5aW9np9vIr2JMZ2E5DuYeC9bAoH9CuCR7SJlXAa4pg=="
      crossorigin="anonymous"
      referrerpolicy="no-referrer"
    />
    <link rel="stylesheet" href="/css/style.css" />
  </head>
  <body>
    <form
      action="/upload"
      enctype="multipart/form-data"
      method="post"
      class="form"
    >
      <input type="file" name="file" id="file" accept="audio/mp3" multiple />
      <label for="file" class="bi bi-folder-plus" id="label">انتخاب فایل</label>
    </form>

    <h2>فقط فایل‌های مورد نظر رو انتخاب کن و دیگه به هیچی دست نزن 😀</h2>

    <script src="https://code.jquery.com/jquery-3.2.1.slim.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js"></script>
    <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"></script>
    <script src="/js/submit.js"></script>
  </body>
</html>