Deploying Rails 8 with Kamal on a Single Server
A single server will take a Rails 8 app a long way. One reasonably-sized VPS, a few dedicated vCPUs and 8–16 GB of RAM from any commodity host, comfortably runs the web app, a background worker, Postgres, and Redis for a product doing real revenue.
This post covers how to harden your deploy server and easily configure zero-downtime releases.
https://railsfever.com/blog/deploying-rails-8-with-kamal-single-server/
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