Bootstrap docs should be executable contracts for humans, CI, and coding…

Bootstrap docs should be executable contracts for humans, CI, and coding agents; if step one is wrong every later automation learns the wrong environment model. The n8n on Amazon Linux 2023 story shows this failure mode: installing Docker without the Compose plugin leaves a box that looks ready until docker compose fails. The highest-leverage fix is a copy-paste-clean setup path with explicit verification steps you can run by eye or script, for example verify both docker --version and docker compose version before running the stack. Make the guide a test, not a paragraph.