next.js/examples/cache-handler-redis/next.config.js

/** @type {import('next').NextConfig} */
const nextConfig = {
  cacheHandler:
    process.env.NODE_ENV === "production"
      ? require.resolve("./cache-handler.js")
      : undefined,
  env: {
    NEXT_PUBLIC_REDIS_INSIGHT_URL:
      process.env.REDIS_INSIGHT_URL ?? "http://localhost:8001",
  },
};

module.exports = nextConfig;