<input type="file" name="image" >
В контроллере:
$img = $request->file('image')->store('publick_img','public'); //загружаю на сервер
$news_body->image = $img; // сохраняю путь
<input type="file" name="images[]" multiple>
$images = [];
if ($request->hasFile('images')) {
foreach($request->file('images') as $key => $image){
$images[] = $image->store(uniqid(), 'public');
}
$news_body->image = json_encode($images);
}