How do I get pixi to expand my canvas and zoom in?

Question

I modified the source code in this example made by the creator: http://www.goodboydigital.com/pixi-js-tutorial-getting-started/ (source download)

Here's what I came up with:

<!DOCTYPE HTML>
<html>
<head>
    <title>pixi.js example 1</title>
    <style>
        body {
            margin: 0;
            padding: 0;
            background-color: #000000;
        }
    </style>
    <script src="pixi.js"></script>

</head>
<body>
    <script>

    // create an new instance of a pixi stage
    var stage = new PIXI.Stage(0x66FF99);

    // create a renderer instance
    var renderer = PIXI.autoDetectRenderer(400, 300);
    renderer.resize(800, 600);

    // add the renderer view element to the DOM
    document.body.appendChild(renderer.view);

    requestAnimFrame( animate );

    // create a texture from an image path
    var texture = PIXI.Texture.fromImage("bunny.png");
    // create a new Sprite using the texture
    var bunny = new PIXI.Sprite(texture);

    // center the sprites anchor point
    bunny.anchor.x = 0.5;
    bunny.anchor.y = 0.5;

    // move the sprite t the center of the screen
    bunny.position.x = 200;
    bunny.position.y = 150;

    var container = new PIXI.DisplayObjectContainer();
    container.scale.x = 2;
    container.scale.y = 2;
    container.addChild(bunny);
    stage.addChild(container);

    function animate() {

        requestAnimFrame( animate );

        // just for fun, lets rotate mr rabbit a little
        bunny.rotation += 0.1;

        // render the stage
        renderer.render(stage);
    }

    </script>

    </body>
</html>

Now the one thing I didn't do is center it. I see two potential ways to do this. I could use CSS to center the canvas (what I'll probably use), or I could do this in code by adding another outer display object to the stage that centers container.