simplify readme example

README.md

@@ -11,15 +11,13 @@ Minimal HTTP router library based on the `URLPattern` API.
 ```ts
 import { createRouter } from "@fartlabs/rtx";
 
-if (import.meta.main) {
-  const router = createRouter()
-    .get<"id">("/animals/:id", (ctx) => {
-      return new Response(`Animal ID: ${ctx.params.id}`);
-    })
-    .default(() => new Response("Not found", { status: 404 }));
-
-  Deno.serve((request) => router.fetch(request));
-}
+const router = createRouter()
+  .get("/", () => {
+    return new Response("Hello, World!");
+  })
+  .default(() => new Response("Not found", { status: 404 }));
+
+Deno.serve((request) => router.fetch(request));
 ```
 
 ### Deno