The slightly simplified process function

async_process.rs

pub async fn process(request: DownloadTask, cfg: ConverterConfig) -> Result<...>{

    let bytes = download_url(request.url).await?;
    let (image, thumbnail) = tokio::task::spawn_blocking(|| process_image(bytes)).await?;
    
    push_to_s3(image, cfg, request.target_path).await?;
    push_to_s3(thumbnail, cfg, request.thumbnail_path).await?;

    info!("Finished download for {}",request.correlation_id);

    Ok(())
}