All packages are configured in the package.json.
Run npm install or manually install the following modules.
npm init
npm install --save-dev gulp
npm install --save-dev gulp-sass
npm install --save-dev gulp-sourcemaps
npm install --save-dev gulp-postcss
npm install --save-dev autoprefixer
npm install --save-dev cssnano
npm install --save-dev gulp-babel
npm install --save-dev gulp-concat
npm install --save-dev gulp-uglify
npm install --save-dev browser-sync
npm install --save-dev gulp-imagemin
npm install --save-dev gulp-eslint
./node_modules/.bin/eslint --init