Project
# install dependencies
npm install
# run gulp for development
gulp
# Run gulp build for building release
gulp build$ npm init --yes
npm i bootstrap browser-sync gulp gulp-pug gulp-sass gulp-autoprefixer gulp-strip-css-comments gulp-sourcemaps gulp-rename gulp-rigger gulp-uglify gulp-plumber gulp-imagemin imagemin-gifsicle imagemin-jpeg-recompress imagemin-pngquant imagemin-svgo gulp.spritesmith gulp-watch jquery popper.js --save-dev
Возможный вариант npm install imagemin-optipng --save-dev