Containerization with Docker — DevOps Engineering Roadmap

Packaging applications and their dependencies into portable containers

Steps in Containerization with Docker

Docker Fundamentals — intermediate · Images, containers, and how Docker differs from a full virtual machine
Writing Dockerfiles — intermediate · Instructions, build context and writing efficient, cacheable Dockerfiles
Docker Images & Layers — intermediate · How layers are built, cached and shared, and keeping images small
Docker Compose for Multi-Container Apps — intermediate · Defining and running multi-service local development environments
Container Networking — intermediate · Bridge networks, container-to-container communication and port mapping
Container Security Basics — intermediate · Running containers as non-root, minimizing attack surface and image provenance
Docker Registries — intermediate · Pushing, pulling and versioning images with Docker Hub or a private registry