import gulp from 'gulp' import imagemin from 'gulp-imagemin' import optipng from 'imagemin-optipng' gulp.task('optimize-png-images', () => { return gulp.src('./build/static/media/*.png') .pipe(imagemin([ pngquant({ quality: [0.2, 0.2], speed: 1 }) ])) .pipe(gulp.dest('build/static/media/')) })