Test Page
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Button Link Example</title>
</head>
<body>
<button onclick="window.location.href='https://av-annotate.org';">
Go to AVAnnotate
</button>
</body>
</html>