next.config.js

const withAntdLess = require("next-plugin-antd-less");
const path = require("path");

/** @type {import('next').NextConfig} */
module.exports = withAntdLess({
  // https://nextjs.org/docs/advanced-features/output-file-tracing#automatically-copying-traced-files
  output: 'standalone',

  reactStrictMode: true,

  /**
   * From Static structure: /about.html
   * To Static structure: /about/index.html
   *
   * But this also make all client url end with a `/`, so we will turn it off
   * https://nextjs.org/docs/api-reference/next.config.js/exportPathMap#adding-a-trailing-slash
   */
  // trailingSlash: false,

  // webpack(config) {
  //   return config;
  // },

  images: { loader: "custom" },

  // sassOptions: {
  //   includePaths: [path.join(__dirname, 'styles')],
  // },

  /**
   * Custom webpack config
   * https://nextjs.org/docs/api-reference/next.config.js/custom-webpack-config
   */

  webpack: (config, { buildId, dev, isServer, defaultLoaders, webpack }) => {
    /**
     * Inject git commit id into debug page
     */
    const git_commit_id = require("child_process")
      .execSync("git rev-parse --short HEAD")
      .toString()
      .trim();
    const stringReplaceLoaderRule = {
      test: /pages\/lucis-debug\/index\.tsx$/,
      loader: "string-replace-loader",
      options: {
        search: "LUCIS_VERSION_COMMIT_ID",
        replace: git_commit_id,
      },
    };
    const rules = config.module.rules;
    rules.push(stringReplaceLoaderRule);

    // Show testnet text on the header
    const git_branch = require("child_process")
      .execSync("cat .git/HEAD")
      // .execSync('git branch --show-current')
      .toString()
      .trim();
    rules.push({
      test: /components\/Header\/Header\.tsx$/,
      loader: "string-replace-loader",
      options: {
        search: '"IS_TESTNET"',
        replace: (git_branch === "ref: refs/heads/trial").toString(),
      },
    });
    console.log("gitBranch", git_branch);
    rules.push({
      test: /components\/Menu\/MenuMobile\.tsx$/,
      loader: "string-replace-loader",
      options: {
        search: '"IS_TESTNET"',
        replace: (git_branch === "ref: refs/heads/trial").toString(),
      },
    });

    // Important: return the modified config
    return config;
  },
});