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const addr = Deno.args[0] || "127.0.0.1:4500";const [hostname, port] = addr.split(":");const listener = Deno.listen({ hostname, port: Number(port) });console.log("Server listening on", addr);
for await (const conn of listener) {  (async () => {    const requests = Deno.serveHttp(conn);    for await (const { respondWith } of requests) {      respondWith(        new Response("Hello World", {          status: 200,          headers: {            server: "deno",            "content-type": "text/plain",          },        }),      )        .catch((e) => console.log(e));    }  })();}