1 - Page HTML5 de base 
<!doctype html>

<html lang="fr">

<head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">

    <title>TITLE</title>
    <meta name="description" content="A simple HTML5 Template for new projects.">
    <meta name="author" content="SitePoint">

    <meta property="og:title" content="TITLE">
    <meta property="og:type" content="website">
    <meta property="og:url" content="URL">
    <meta property="og:description" content="DESCRIPTION">
    <meta property="og:image" content="favicon.svg">

    <link rel="icon" href="/favicon.ico">
    <link rel="icon" href="/favicon.svg" type="image/svg+xml">
    <link rel="apple-touch-icon" href="/apple-touch-icon.png">

    <link rel="stylesheet" href="styles.css?v=1.0">

</head>

<body>
    <!-- your content here... -->
    <script src="scripts.js"></script>
</body>

</html>