minimize container size and caching

vite.config.server.ts

@@ -0,0 +1,27 @@
+import { defineConfig } from "vite"
+import { builtinModules } from 'module'
+
+export default defineConfig({
+  ssr: {
+    noExternal: true, // bundle every dependency
+  },
+  build: {
+    target: 'node24',           // match your Node.js version
+    outDir: 'build-server',
+    emptyOutDir: false,         // don't wipe the frontend build output
+    ssr: true,                  // tells Vite this is a server-side build
+    minify: 'esbuild',          // minify the output
+    lib: {
+      entry: 'server.js',       // your server entry point
+      formats: ['es'],
+      fileName: () => 'server.js',
+    },
+    rollupOptions: {
+      // Externalize only Node.js built-ins, bundle everything else
+      external: [
+        ...builtinModules,
+        ...builtinModules.map(m => `node:${m}`),
+      ],
+    },
+  },
+})