Trouble with Scaling to game to window size

Phaser 3
1

I am trying to get my game to scale to the window size and fill the whole thing, currently when I add Phaser.Scale.FIT the image im displaying seems to disappear completely.

`<!doctype html>

Making your first Phaser 3 Game - Part 1 html, body, #container { height: 100%; } 
    body {
        margin: 0;
        padding: 0;
        background: #111;
        color: #eee;
        font: caption;
    }

    #game {

        background: black;
        border: thin dashed;
    }

</style>
`