Listen announces on the local transport address.

const listener1 = Deno.listen({ port: 80 })
const listener2 = Deno.listen({ hostname: "192.0.2.1", port: 80 })
const listener3 = Deno.listen({ hostname: "[2001:db8::1]", port: 80 });
const listener4 = Deno.listen({ hostname: "golang.org", port: 80, transport: "tcp" });

Requires allow-net permission.