Start with the Docker lesson.
Then Kubernetes, a pipeline, and an incident runbook. That is the order the work shows up.
Open the Docker lesson1
Containerize
Images, Dockerfiles, and why localhost inside a container is not your laptop.
2
Orchestrate
Pods, Deployments, and Services. Compose until that is not enough.
3
Automate
A pipeline that can refuse a bad build, written in the repo.
4
Operate
Alerts, a runbook, and what to do in the first hour of an incident.