add dockerfile

vite.config.js

@@ -11,6 +11,21 @@ export default defineConfig({
       '@': path.resolve(import.meta.dirname, './src'),
     },
   },
+  build: {
+    rollupOptions: {
+      output: {
+        // Split the heavy libraries out of the app bundle. They change far less
+        // often than app code, so browsers keep them cached across deploys.
+        manualChunks: {
+          react: ['react', 'react-dom', 'react-router-dom'],
+          charts: ['recharts'],
+          motion: ['framer-motion'],
+          markdown: ['react-markdown'],
+          canvas: ['html2canvas'],
+        },
+      },
+    },
+  },
   server: {
     // Honor a port assigned by the environment; fall back to Vite's default.
     port: process.env.PORT ? Number(process.env.PORT) : 5173,