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frontend/vite.config.js

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+import { defineConfig } from "vite";
+import react from "@vitejs/plugin-react";
+import { readFileSync } from "fs";
+import { fileURLToPath } from "url";
+import { dirname, join } from "path";
+
+const __dirname = dirname(fileURLToPath(import.meta.url));
+const pkg = JSON.parse(readFileSync(join(__dirname, "package.json"), "utf-8"));
+
+export default defineConfig({
+  plugins: [react()],
+  server: {
+    port: 5173,
+    // In dev: proxy /api naar de backend zodat je geen CORS-issues hebt
+    proxy: {
+      "/api": {
+        target:       "http://backend:3001",
+        changeOrigin: true,
+        secure:       false,
+      },
+    },
+  },
+  build: {
+    outDir:         "dist",
+    sourcemap:      false,   // zet op true voor staged deploys
+    chunkSizeWarningLimit: 800,
+    rollupOptions: {
+      output: {
+        // Splits vendor chunks voor betere caching
+        manualChunks: {
+          react: ["react", "react-dom"],
+        },
+      },
+    },
+  },
+  define: {
+    // VITE_API_URL wordt ingebakken tijdens build
+    __API_URL__: JSON.stringify(process.env.VITE_API_URL ?? "/api"),
+    __APP_VERSION__: JSON.stringify(process.env.VITE_APP_VERSION ?? pkg.version),
+  },
+});