Yarn build (example)

yarn run v1.22.19

$ next build
- info Loaded env from /srv/meld.fi/client/.env
Attention: Next.js now collects completely anonymous telemetry regarding usage.
This information is used to shape Next.js' roadmap and prioritize features.
You can learn more, including how to opt-out if you'd not like to participate in this anonymous program, 
by visiting the following URL:
https://nextjs.org/telemetry

- info Linting and checking validity of types
- info Disabled SWC as replacement for Babel because of custom Babel configuration ".babelrc" 
https://nextjs.org/docs/messages/swc-disabled
- info `compiler` options in `next.config.js` will be ignored while using Babel 
https://nextjs.org/docs/messages/ignored-compiler-options
- info Using external babel configuration from /srv/meld.fi/client/.babelrc
Warning: For production Image Optimization with Next.js, the optional 'sharp' package is strongly 
recommended. Run 'yarn add sharp', and Next.js will use it automatically for Image Optimization.
Read more: https://nextjs.org/docs/messages/sharp-missing-in-production
- info Creating an optimized production build .

See also

• yarn [ create | list | up | add | run | install | build | transpile | transpile-watch | wsrun| version | --help ]