This application is built with yarn, but you're free to use any package management you want to.
# update AstroJS and related packages
$ npx @astrojs/upgrade
# install all dependencies
$ yarn
# start dev server
$ yarn dev
# builds the app and publishes it into `dist` folder
$ yarn build
# preview the app that was built
$ yarn preview
# run astro commands
$ yarn astro ...