personal-homepage/astro.config.mjs

import { defineConfig } from 'astro/config';
import { loadEnv } from 'vite';

export default defineConfig(({ mode }) => {
  const env = loadEnv(mode, process.cwd(), '');
  const site = env.PUBLIC_SITE_URL?.trim();

  return {
    ...(site ? { site } : {}),
  };
});