In the past, I used nginx¹ personally and in all my jobs/companies that I dealt with. These days, Caddy² is my web server/reverse-proxy of choice. It features automatic HTTPS and is just a joy to use.

I'm using the "Caddyfile" approach that lives in my super user's root folder. Setting up this Rails app is as simple as this:

indr0.de {
  reverse_proxy localhost:3000
}

Starting the server in the background is a simple:

caddy start

The docs³ are great and tell you everything you need to get started.