Update Vite configuration to enable host access and fix proxy server URL to use the current hostname.

client/vite.config.ts

@@ -5,7 +5,9 @@ import { defineConfig } from "vite";
 // https://vitejs.dev/config/
 export default defineConfig({
   plugins: [react()],
-  server: {},
+  server: {
+    host: true,
+  },
   resolve: {
     alias: {
       "@": path.resolve(__dirname, "./src"),