docs: add example with oak (2)

README.md

@@ -82,7 +82,8 @@ const io = new Server<
 
 ### With oak
 
-You need to use the [.handle()](https://github.com/oakserver/oak#handle-method) method:
+You need to use the [.handle()](https://github.com/oakserver/oak#handle-method)
+method:
 
 ```ts
 import { serve } from "https://deno.land/std@0.166.0/http/server.ts";
@@ -92,32 +93,27 @@ import { Application } from "https://deno.land/x/oak@v11.1.0/mod.ts";
 const app = new Application();
 
 app.use((ctx) => {
-    ctx.response.body = "Hello World!";
+  ctx.response.body = "Hello World!";
 });
 
 const io = new Server();
 
 io.on("connection", (socket) => {
-    console.log(`socket ${socket.id} connected`);
+  console.log(`socket ${socket.id} connected`);
 
-    socket.emit("hello", "world");
+  socket.emit("hello", "world");
 
-    socket.on("disconnect", (reason) => {
-        console.log(`socket ${socket.id} disconnected due to ${reason}`);
-    });
+  socket.on("disconnect", (reason) => {
+    console.log(`socket ${socket.id} disconnected due to ${reason}`);
+  });
 });
 
 const handler = io.handler(async (req) => {
-    const response = await app.handle(req);
-    if (response) {
-        return response;
-    } else {
-        return new Response(null, { status: 404 });
-    }
+  return await app.handle(req) || new Response(null, { status: 404 });
 });
 
 await serve(handler, {
-    port: 3000,
+  port: 3000,
 });
 ```