Access Rails with Virtual Host?

[pramanadiputra]

I recently launched my Rails web app with Laragon, by following this tutorial:
https://laragon.org/download/install-rails.html

All works fine, but my question is why when I use Apache or Nginx to access my rails web app: railsapp.dev, it's showing index of/ (containing the structure of my dir), means that it's not properly recognizing my Rails.

But when I use Puma Server from Rails itself, it's recognizing my Rails web app, which I wrote <h1>Welcome to RoR</h1>

My question is how can I work with railsapp.dev instead of localhost:3000 / use Apache/Nginx instead of Puma Server.

Thank You