Minimal nginx proxy example

example.barrera.io.conf

server {
  listen 8080;
  server_name example.barrera.io;
 
  error_page   500 502 503 504  /50x.html;
  location = /50x.html {
    root   /var/www/htdocs;
  }
 
  location / {
    proxy_pass http://localhost:8080;
  }
}