End-to-end reference for Clean Architecture — the Dependency Rule, the four concentric layers, Hexagonal/Onion equivalence, worked Python and Go examples with ports and adapters, tradeoffs, DDD-lite integration, and interview-ready Q&A.
End-to-end reference for Docker — images and layers, Dockerfile essentials, the container lifecycle, networking and volumes, docker-compose, a debugging playbook, and interview-ready Q&A.
End-to-end reference for Git — the object model, branching/merging vs rebasing, staging, conflict resolution, safely undoing things, and interview-ready Q&A.
End-to-end reference for Python — core language, data structures, OOP, concurrency, decorators/generators, error handling, testing, ops/DevOps automation scripting (subprocess, argparse, requests, boto3, SSH fleets), and interview-ready Q&A.