How to validate a file type in laravel

laravel 8

\request ()->validate(['photo' => 'mimes:jpg,bmp,png']);

official documentation link

Does it have to just be .jpg? If so then something like:

'image' => 'required|mimes:jpeg'

Documentation: http://laravel.com/docs/5.1/validation#rule-mimes

If it can be any type of image, then:

'image' => 'required|image'

Documentation: http://laravel.com/docs/5.1/validation#rule-image