So far we”ve developed and run sample NEXT.JS application in dev mode, now we”ll do the production ready deployment locally using following steps.

• npm run build − Build the production ready, highly optimized build.

• npm run start − Start the server.

The production ready build lacks source maps and hot code reloading as compared to dev mode as those features are primarily used in debugging.

Prepare Build

Run the following command to prepare production ready build −.

npm run build

> [email protected] build Nodenextjs
> next build

info  - Loaded env from Nodenextjs.env.local
Creating an optimized production build

Compiled successfully.

Automatically optimizing pages

Page                                                           Size     First Load JS
+ ? /                                                          2.25 kB        60.3 kB
+   /_app                                                      288 B          58.1 kB
+        /404                                                       3.25 kB   61.3 kB
+ ? /api/user
+ ? /posts/[id]                                                312 B          61.6 kB
+   + /posts/one
+   + /posts/two
+ ? /posts/env                                                 2.71 kB        60.8 kB
+ ? /posts/first                                               374 B          61.7 kB
+ First Load JS shared by all                                  58.1 kB
  + static/pages/_app.js                                       288 B
  + chunks/3458401054237127135bcd3ee8eb2a19d67af299.a1a019.js  10.5 kB
  + chunks/framework.c6faae.js                                 40 kB
  + runtime/main.60464f.js                                     6.54 kB
  + runtime/webpack.c21266.js                                  746 B
  + css/9706b5b8ed8e82c0fba0.css                               175 B

?  (Server)  server-side renders at runtime (uses getInitialProps or getServerSideProps)
          (Static)  automatically rendered as static HTML (uses no initial props)
?  (SSG)     automatically generated as static HTML + JSON (uses getStaticProps)

Start the server

Run the following command to start production server −.

npm run start

> [email protected] start Nodenextjs
> next start

info  - Loaded env from Nodenextjs.env.local
ready - started server on http://localhost:3000

Verify Output

Open localhost:3000/api/user in a browser and you will see the following output.

{"name":"Robert"}