Enable NextJS File Poll Watcher

.env.local

NEXT_WEBPACK_USEPOLLING=1

next.config.js

// Source: https://medium.com/mikkotikkanen/solving-next-js-fast-refresh-on-docker-windows-71dfdb3ee785
/** @type {import('next').NextConfig} */
const nextConfig = {
  reactStrictMode: true,
  swcMinify: true,
  webpack: (config, context) => {
    // Enable polling based on env variable being set
    if(process.env.NEXT_WEBPACK_USEPOLLING) {
      config.watchOptions = {
        poll: 500,
        aggregateTimeout: 300
      }
    }
    return config
  },
}

module.exports = nextConfig