ruby on rails, sqlite, sidekiq + redis, and caddy, all hosted on a single hetzner dedicated server. no front-end frameworks, only tailwind.

tarsnap and restic for offsite backups.

I push code to github; then capistrano (think bash script with some bells and whistles) deploys that code to the server and restarts systemd processes.

I've been running this saas business for 3+ years and wouldn't change a thing. I'm also working on a new business with the exact same stack.