html to png handler

index.ts

export const handler = async (
    event: Event,
    context: Context,
    callback: Callback
) => {
    try {
        const body = validateBody(event.body);

        const image = await takeScreenshot(body.html, body.width, body.height);
        const res = await new Promise((resolve, reject) => {
            const s3 = new S3({
                apiVersion: "2006-03-01",
                region: "us-east-1"
            });
            const params = {
                Bucket: bucketName,
                Key: body.name,
                Body: image,
                ContentEncoding: "base64",
                ContentType: "image/png"
            };
            s3.upload(
                params,
                (err: Error, uploadResult: { Location: string }) => {
                    if (err) {
                        return reject(err);
                    }
                    resolve({ imageUri: uploadResult.Location });
                }
            );
        });

        callback(null, res);
    } catch (err) {
        callback(err);
    }
};