text: const gulp = require('gulp');
  const minifyCss = require('gulp-clean-css');
  const rename = require('gulp-rename');
  
  gulp.task('minify-css', () => {
      gulp.src('content/styles/*.css')
      .pipe(minifyCss())
      .pipe(rename({
          suffix: '.min'
      }))
      .pipe(gulp.dest('content/styles'))
  })