todo/src/client/next.config.js

const withPWA = require("next-pwa");
const runtimeCaching = require("next-pwa/cache");

const { PHASE_DEVELOPMENT_SERVER } = require("next/constants");

module.exports = (phase, { defaultConfig }) => {
  if (phase === PHASE_DEVELOPMENT_SERVER) {
    return {
      reactStrictMode: true,
    };
  }

  return withPWA({
    reactStrictMode: true,
    pwa: {
      dest: "public",
      runtimeCaching,
    },
  });
};