Edge computing has moved from concept to infrastructure. Understanding when to run logic at the edge versus centrally in the cloud is now a practical architectural decision, not a theoretical one.
Why Docker images get bloated, how layer caching works in practice, and the specific techniques that produce small, fast, secure images without sacrificing developer experience.
What CI/CD actually is, why it matters, and how to build a real pipeline from scratch using GitHub Actions that runs tests, builds artifacts, and deploys automatically.
What Docker actually is under the hood - from a Dockerfile to a running container, and where registries fit in.
You don't need to be a sysadmin to be effective on Linux - you need to understand processes, file descriptors, permissions, and signals well enough to debug what goes wrong in production.
