astro.config.mjs

import { defineConfig } from 'astro/config';
import tailwind from '@astrojs/tailwind';
import react from '@astrojs/react';
import mdx from '@astrojs/mdx';
import cloudflare from '@astrojs/cloudflare';

// i18n locale configuration (synced with i18n/config.ts)
const SUPPORTED_LOCALES = ['en'];
const DEFAULT_LOCALE = 'en';

// https://astro.build/config
export default defineConfig({
  output: 'server',
  adapter: cloudflare({
    // Cloudflare Pages configuration
    imageService: 'sharp',
  }),
  integrations: [
    react({
      // Enable React for client-side islands
      experimentalReactChildren: true,
    }),
    tailwind({
      // Apply Tailwind CSS to all files
      applyBaseStyles: false,
    }),
    mdx({
      // MDX configuration for blog posts
      optimize: true,
    }),
  ],
  i18n: {
    defaultLocale: DEFAULT_LOCALE,
    locales: SUPPORTED_LOCALES,
    routing: {
      // Don't prefix default locale (en) in URLs
      prefixDefaultLocale: false,
    },
  },
  vite: {
    // Preserve existing path aliases
    resolve: {
      alias: {
        '@/*': './*',
        '@src/*': './src/*',
        '@i18n/*': './i18n/*',
        '@shared/*': './shared/*',
        '@server/*': './server/*',
        '@client/*': './client/*',
        '@lib/*': './lib/*',
        '@locales/*': './locales/*',
        '@app/*': './app/*',
        // Fix for React 18.2.x + Vite 6 + @astrojs/react compatibility
        // Map server.edge to server.browser for React 18.2 compatibility
        'react-dom/server.edge': 'react-dom/server.browser',
      },
    },
  },
  // Ensure trailing slashes are handled correctly
  trailingSlash: 'ignore',
  // Build configuration
  build: {
    // Inline stylesheets under a threshold
    inlineStylesheets: 'auto',
  },
  // Security headers are applied in middleware
  // Image optimization (uses sharp in Cloudflare Workers)
  image: {
    remotePatterns: [
      {
        protocol: 'https',
        hostname: 'api.dicebear.com',
      },
      {
        protocol: 'https',
        hostname: 'images.unsplash.com',
      },
    ],
  },
});