What do you want to add? Create a new file, type HTML. Maybe the template is a
bit outdated. You can find it here: \Template\Default.html Open it and edit it
to your needs.
Here is an example of a better HTML5 template:
<!DOCTYPE html>
<html lang="de">
<head>
<title>Title</title>
<meta charset='utf-8'>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="style.css">
</head>
<body>
<div>
Content
</div>
<script>
// code
</script>
</body>
</html>
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