config/image_optim.yml

   1 skip_missing_workers: true
   2 pngout: false
   3 pngcrush: false
   4 advpng: false
   5 optipng: false
   6 pngquant: false
   7 jhead: false
   8 jpegoptim: false
   9 gifsicle: false
  10 jpegtran: false