index.html

<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="utf-8" />
        <title>My first three.js app</title>
        <style>
            html {
                height: 100%;
                }
                body {
                margin: 0;
                height: 100%;
                }
                canvas {
                width: 100%;
                height: 100%;
                display: block;
                }
        </style>
    </head>
    <body>
        <div
            id="info"
            style="
                text-align: center;
                white-space: pre; 
                height: 25px;
                background-color: rgb(70, 70, 70);
                color: aliceblue;
                font-family: 'Open Sans', sans-serif;
            "
        > Left click on an image: Open the image    |    Right click on an image: Select the image </div> <!-- Single line because of white-space:pre -->
        <script type="module" src="/main.js"></script>
    </body>
</html>