Function generateThumbnail
- generateThumbnail(file, mediaType, options): Promise<{ 
    originalImageDimensions: undefined | { 
        height: number; 
        width: number; 
    }; 
    thumbnail: undefined | string; 
}> Parameters
file: string
mediaType: "image" | "video"
options: { 
    logger?: Logger; 
}
Returns Promise<{ 
    originalImageDimensions: undefined | { 
        height: number; 
        width: number; 
    }; 
    thumbnail: undefined | string; 
}>
generates a thumbnail for a given media, if required