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Docker Learning Roadmap

A structured path from basic containers to production-grade image and runtime practices.

Estimated time:3–5 weeks

1🌱

Phase 1 — Fundamentals

Images vs. containers

Dockerfile basics (FROM, RUN, COPY, CMD)

docker run / exec / logs / ps

Container networking basics (bridge, host)

Volumes & bind mounts

2🏗️

Multi-stage builds

Layer caching & build context optimization

Minimal base images (alpine, distroless)

.dockerignore & reproducible builds

BuildKit & buildx

3⚙️

Custom bridge networks & DNS

Resource limits (cpus, memory)

Healthchecks

Restart policies

4🔐

important

Running as non-root user

Image scanning (Trivy/Snyk)

Secrets handling (build-time vs runtime)

Registry management & image signing

Begin with interview questions to assess your current level.