html,
body {
    box-sizing: border-box;
    margin: 0;
    height: 100%;
    background: white;
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: sans-serif;
}

.image-container {
    display: flex;
    height: 100%;
    width: 100%;
    max-width: 100%;
    position: relative;
}

.canvas{
    width: auto;
    max-height: 100%;
    max-width: 100%;
    display: block;
    margin: auto;
}