add lang attribute to html in Nextjs

Timonwa Akintokun

This code exports a module with the name "next.config.js" and contains an object with the name "i18n" . The object has two properties: "locales" and "defaultLocale" . The "locales" property contains an array of strings, one for each language. The "defaultLocale" property specifies the default language.

Library: next

/* next.config.js  */
module.exports = {
  i18n: {
    locales: ["en"],
    defaultLocale: "en",
  },
};