title: Why does wiki.js need public URL when installing?
body: <p>After configuring my database and running my Wiki.js instance using nodejs, I was prompted to &quot;install&quot; Wiki.js on <code>localhost:3000</code>. However, there is this input bar asking for the public URL <code>wiki.example.com</code>:
  <a href="https://i.stack.imgur.com/jCq5N.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/jCq5N.png" alt="Wiki.js installation page with public URL input" /></a>
  I am trying wiki.js out on my own computer, which has nothing to do with public URLs. In the future, I plan to use <code>nginx</code> to reverse proxy received request to two different ports on my server, which also does not require public URL exposing to the service (proxied by <code>nginx</code> already).</p>
  <p>Therefore I am curious: Why does wiki.js need public URL when installing? What do I need to configure when testing Wiki.js on my computer? What do I need to configure in nginx reverse proxy and what to fill here in the public URL input bar?</p>