next.config.ts

import type { NextConfig } from "next";
import path from "path";
import { fileURLToPath } from "url";

const __filename = fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);

const isGithubPages = process.env.GITHUB_PAGES === "true";
const basePath = process.env.NEXT_PUBLIC_BASE_PATH ?? "";

const nextConfig: NextConfig = {
  reactStrictMode: true,
  poweredByHeader: false,
  outputFileTracingRoot: path.join(__dirname),
  ...(isGithubPages
    ? {
        output: "export",
        basePath,
        assetPrefix: basePath ? `${basePath}/` : undefined,
        trailingSlash: true,
      }
    : {}),
  images: {
    unoptimized: isGithubPages,
    formats: ["image/avif", "image/webp"],
  },
};

export default nextConfig;