#app{
    background-image: url("assets/background.jpg");
        /* Full height */
        height: 100%; 

        /* Center and scale the image nicely */
        background-position: center;
        background-repeat: no-repeat;
        background-size: cover;
}

#centertext{
    position: absolute;
    top:0;
    bottom: 0;
    left: 0;
    right: 0;

    margin: auto;
}