一時的なインフラ、テストワークフロー、Rackmintの構築方法についてのノートです。
Long-lived staging environments accumulate drift. Disposable clusters let every test run start from a clean, real deployment—with real dependencies, real networking, and no cleanup burden.
A walkthrough of wiring Rackmint into CI so every pull request gets a live, ephemeral cluster.
A look at the upfront reservation, proportional CPU/RAM pricing, and why prepaid accounts get a TTL.
