build: update base URL and router configuration for custom domain

Update Vite config and router basename to use root path for production
Add CNAME file for custom domain deployment

public/CNAME

@@ -0,0 +1 @@
+onixbyte.dev

src/router/index.tsx

@@ -9,7 +9,8 @@ import ContactPage from "@/page/contact"
  * Main application router configuration using React Router v6.
  * Defines all routes and their corresponding components.
  */
-const router = createBrowserRouter([
+const router = createBrowserRouter(
+  [
     {
       path: "/",
       element: <App />,
@@ -29,8 +30,10 @@ const router = createBrowserRouter([
         },
       ],
     },
-], {
-  basename: process.env.NODE_ENV === 'production' ? '/react-template' : '/'
-})
+  ],
+  {
+    basename: "/",
+  }
+)
 
 export default router

vite.config.ts

@@ -6,7 +6,7 @@ import tailwindcss from "@tailwindcss/vite"
 // https://vite.dev/config/
 export default defineConfig({
   plugins: [react(), tailwindcss()],
-  base: process.env.NODE_ENV === 'production' ? '/react-template/' : '/',
+  base: "/",
   resolve: {
     alias: {
       "@": fileURLToPath(new URL("./src", import.meta.url)),