next.config.js

/** @type {import('next').NextConfig} */
const withPWA = require('next-pwa')
const runtimeCaching = require('next-pwa/cache')

module.exports = withPWA({
  pwa: {
    dest: 'public',
    runtimeCaching,
    // 現状この設定を追加しないとエラーになってしまうので追加
    // 参考: https://github.com/shadowwalker/next-pwa/issues/288
    buildExcludes: [/middleware-manifest.json$/]
  },
  reactStrictMode: true,
})