You may want to use --prefix wordpress/wp-content/themes/nick-jaussi
with any npm command, so you don't have to switch into the theme directory.
npm install
Watch for changes npm run watch
or compile assets once running npm run compile
Lint JS: npm run lint-js
(fix npm run lint-js -- --fix
)
Lint CSS: npm run lint-css
Compile assets running npm run compile-production