Prove It on Your Machine

You don't need a server to prove the deploy story

Here's the whole point of this lesson: everything Kamal would do on a real VPS — build the image, boot the container, run db:prepare, serve traffic through Thruster — can be proven on YOUR laptop first, with plain docker build and docker run. No server, no domain, no waiting. This is exactly what was verified against this repo before a single Kamal command was ever written.