You can use the following code in your deployctl.ts file:

```ts
import { Application, Router } from "https://deno.land/x/oak/mod.ts";

const app = new Application();
const router = new Router();

// Redirect root domain to www subdomain
router.get("/", (ctx) => {
  ctx.response.redirect("https://www.yourdomain.com");
});

// Handle requests to www subdomain
router.get("/(.*)", (ctx) => {
  // your app logic here
});

app.use(router.routes());
app.use(router.allowedMethods());

addEventListener("fetch", app.fetchEventHandler());
```
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