If you're using Visual Studio Code, here's a tip to quickly generate a basic HTML Template. Note: Your document type will have to be set to HTML. In an .html document, type html:5 and press tab.
Below is the raw output, in case you are not using Visual Studio Code, or are not able to get the above tip to work.
<!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>
<body>
</body>
</html>