public function updateImage(Startup $startup, $image)
 {
     $image = Input::file('image');
     if (!empty($startup->image)) {
         unlink(public_path() . DIRECTORY_SEPARATOR . 'images' . DIRECTORY_SEPARATOR . 'upload' . DIRECTORY_SEPARATOR . $startup->image);
     }
     $newPath = public_path() . DIRECTORY_SEPARATOR . 'images' . DIRECTORY_SEPARATOR . 'upload';
     $newName = $startup->id . '.' . $image->getClientOriginalExtension();
     $image->move($newPath, $newName);
     $startup->image = $newName;
     $startup->save();
 }