Generate images API

{
    "timeline": {
        "fonts": [
            {
                "src": "https://shotstack-assets.s3.amazonaws.com/fonts/PTSerif-Italic.ttf"
            },
            {
                "src": "https://shotstack-assets.s3.amazonaws.com/fonts/Montserrat-SemiBold.ttf"
            }
        ],
        "background": "#000000",
        "tracks": [
            {
                "clips": [
                    {
                        "asset": {
                            "type": "html",
                            "html": "<p>Have no fear of</p> <p>perfection, you'll</p><p>never reach it.</p>",
                            "css": "p { font-family: 'Montserrat'; font-size: 69px; text-align: center; line-height: 120%;}",
                            "width": 800,
                            "height": 300
                        },
                        "start": 0,
                        "length": 5,
                        "offset": {
                            "y": 0
                        }
                    },
                    {
                        "asset": {
                            "type": "html",
                            "html": "<p>Boab Mcgraw<p/>",
                            "css": "p { font-family: 'PTSerif'; color: #000000; font-size: 41px; text-align: center; font-style: italic; font-weight: 300; }",
                            "width": 800,
                            "height": 100
                        },
                        "start": 0,
                        "length": 5,
                        "offset": {
                            "y": -0.22
                        }
                    }
                ]
            },
            {
                "clips": [
                    {
                        "asset": {
                            "type": "image",
                            "src": "https://shotstack-assets.s3.amazonaws.com/templates/images/quote/quote.png"
                        },
                        "start": 0,
                        "length": 5,
                        "fit": "none"
                    }
                ]
            }
        ]
    },
    "output": {
        "format": "png",
        "size": {
            "width": 1000,
            "height": 1000
        }
    }
}