title: How can i get domain name in Nestjs?
body: <p>Now, i want to get domain name. I don't want hardcode for path return 
  eg: <a href="https://mydomain/url-img" rel="nofollow noreferrer">https://mydomain/url-img</a>. My purpose is when i develop in local enviroment, I can return url which like that <a href="http://localhost:3000/url-img" rel="nofollow noreferrer">http://localhost:3000/url-img</a>.</p>