Hello, @emanuelrahn

What you can do in order to achieve this is to set a Nginx reverse proxy. You can do this by editing the nginx configuration file:

open/create the config file /etc/nginx/sites-available/domain.com

You should have the following content:

server {
  listen 80;
  server_name domain.com;

  location / {
   proxy_pass http://localhost:9000;
  }
}

You need to create the symlink for the file and make it available in the sites-enabled directory as well:

sudo ln -s /etc/nginx/sites-available/domain.com /etc/nginx/sites-enabled/domain.com

Then check the Nginx configuration files for any syntax errors:

sudo nginx -t

If you see that the Syntax is Okay, then restart Nginx. If you get some syntax errors, check the exact row/line that was reported in the message and sort this out before you continue further.

sudo systemctl restart nginx

You can also see this amazing video tutorial on how to do this on a DigitalOcean droplet:

https://www.youtube.com/watch?v=spbkCihFpQ8

Hope this helps!

Regards,
Alex