bt_test.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<form method="POST">
    <input type="text" name="product_name" placeholder="Enter product name" required>
    <button type="submit">Submit</button>
</form>

</body>
</html>