access the Dashboard from localhost

[Silver2410]

I don't have much experience with linux, nginx nor ruby on rails, but I still managed to solve few issues here and there and to install everything on Ubuntu 20.10 (great guide by the way, a really well done job)

I'm experimenting things on a virtual machine on my laptop, and after managing to set up everything without any error I can't access to the dashboard/sign in screen from my browser.

here's my decidim.conf file

server {
    listen 80;
    listen [::]:80 ipv6only=on;

    server_name localhost;
    client_max_body_size 32M;

    passenger_enabled on;
    passenger_ruby /home/silver/.rbenv/shims/ruby;

    rails_env    production;
    root         /home/silver/decidim-app/public;
}

"silver" is of course the username on my machine (passenger_ruby points to /home/silver/.rbenv/shims/ruby, and not to the guide's decidim/.rbenv/ )

After setting up localhost as my server_name nginx doesn't show me the classic "welcome to nginx" message anymore (still available from 127.0.0.1 and 127.0.1.1) when I try to access it, but a "can't reach the website" error (ERR_CONNECTION_REFUSED), so I can tell that something happens.

addresses like http://localhost, http://localhost/system and http://localhost/system/admins/sign_in (not HTTPS) cannot be reached, but resources like http://localhost/422.html or http://localhost/robots.txt, available in the home/silver/decidim-app/public/ folder can be accessed.

Here's a screen of the content of my public folder, I don't know if is needed... again, I still don't have experience with ruby on rails, so there are more chances I'm missing something of very silly rather than not having the needed files.