<!-- Use CSS to center-align the image within its container. -->
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Simple page</title>
    <style>
        .container {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            background-color: aliceblue;
            display: flex;
            align-items: center;
            justify-content: center;
            width: 50%;
            height: 50%;
            border: 1px solid black;
        }
    </style>
</head>
<body>
    <div class="container">
        <img src="dev.png" alt="Dev Icon">
    </div>
</body>
</html>