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frontend/astro.config.mjs

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+// @ts-check
+import { defineConfig } from 'astro/config';
+import node from '@astrojs/node';
+import tailwindcss from '@tailwindcss/vite';
+import preact from '@astrojs/preact';
+const isDev = process.env.NODE_ENV === 'development';
+
+// https://astro.build/config
+export default defineConfig({
+  output: 'server',
+
+  adapter: node({
+    mode: 'standalone'
+  }),
+
+  // 🛰️ Postavke razvojnog poslužitelja unutar Docker mreže
+  server: {
+    host: true, // Sluša na 0.0.0.0 unutar kontejnera
+    port: 4321, // Unutarnji port kontejnera
+  },
+
+  vite: {
+    resolve: {
+      alias: {
+        react: 'preact/compat',
+        'react-dom': 'preact/compat',
+        'react-dom/test-utils': 'preact/test-utils',
+        'react/jsx-runtime': 'preact/jsx-runtime',
+        'react/jsx-dev-runtime': 'preact/jsx-dev-runtime',
+      },
+    },
+    define: {
+      __PUSHER_KEY__: JSON.stringify(process.env.PUBLIC_PUSHER_KEY || process.env.PUSHER_KEY || ''),
+      __PUSHER_CLUSTER__: JSON.stringify(process.env.PUBLIC_PUSHER_CLUSTER || process.env.PUSHER_CLUSTER || ''),
+    },
+    ssr: {
+      noExternal: ['@react-spring/web', '@react-spring/core', '@react-spring/animated', '@react-spring/shared'],
+    },
+    build: {
+      assetsInlineLimit: 1024,
+    },
+    plugins: [tailwindcss()],
+
+    // ⚙️ Ugrađene preporuke za Docker File Watching i Tihi Refresh (HMR)
+    server: isDev ? {
+      hmr: {
+        protocol: 'ws',
+        host: 'localhost',
+        // Mora odgovarati mapiranom portu u docker-compose (4321:4321)
+        clientPort: 4321,
+      },
+      watch: {
+        // Prisiljava Vite na "polling" sustav jer Windows/WSL2 volumeni nekad blokiraju inotify signale
+        usePolling: true,
+        interval: 100,
+      }
+    } : {}, // U produkciji je ovaj blok potpuno prazan radi maksimalnih performansi
+  },
+
+  // Redoslijed integracija: Tailwind pa Preact
+  integrations: [preact()],
+});