Why Your Docker Images Are 4.2GB and Your CI Pipeline Fails at late at night: The Kernel-Space Truth About Layer Caching, BuildKit’s Hidden Gotchas, and Why COPY . . Is a Production Liability
I woke up at 2:58 AM on a Tuesday in March 2021 because my phone screamed *“a fintech startup I worked at Payment Reconciliation Service — Deployment Failed (Prod)”*. Not staging. Not canary. Prod. And not just failed—*silently corrupted*: TLS handsh...