rb-portless

https://github.com/davafons/rb-portless

A native-Ruby port of Vercel's portless. Run your dev server through a local reverse proxy and reach it at https://.localhost instead of a port — HTTPS by default, with an on-demand local CA, per-host certs, and a random backend port so you never collide on 3000/3001 again. Framework-agnostic; first-class with Rails.