Containers vs Virtual Machines
Containers share the host kernel; VMs include a full guest OS—containers start faster and use less overhead.
Note: Expand this section with your own examples and production notes.
Learn containers, images, networking, and Dockerfile best practices from zero to production-ready.
Prerequisites: Basic computer literacy; prior Docker exposure helpful.
Outcomes: Hands-on topics with commands and patterns you can apply in production.
Containers share the host kernel; VMs include a full guest OS—containers start faster and use less overhead.
dockerd runs containers; containerd manages runtimes; images layer on union filesystems.
Install Docker Engine on Linux or Docker Desktop for local dev.
curl -fsSL https://get.docker.com | sh
sudo usermod -aG docker $USERImages are immutable templates; tags point to digests in registries.
Multi-stage builds shrink attack surface and image size.
FROM node:20-alpine AS build
WORKDIR /app
COPY . .
RUN npm ci && npm run build
FROM nginx:alpine
COPY --from=build /app/dist /usr/share/nginx/htmlTag with registry URL; push after docker login.
docker build -t myregistry.io/app:v1 .
docker push myregistry.io/app:v1docker run starts containers; -d detaches; --rm cleans up on exit.
Bridge networks isolate apps; publish ports with -p host:container.
Named volumes persist data beyond container lifecycle.
docker volume create app-data
docker run -v app-data:/data myappRun as non-root; scan images with Trivy; pin base image digests.
Order Dockerfile layers from least to most frequently changed.
Set --cpus and --memory to prevent noisy neighbors.
docker run --cpus="1.5" --memory="512m" myappBasic Docker: Learn containers, images, networking, and Dockerfile best practices from zero to production-ready. Free beginner course (~10h) from Skillzmist.
Entity: Basic Docker — optimized for AI search extraction (ChatGPT, Gemini, Claude, Perplexity).
Learn containers, images, networking, and Dockerfile best practices from zero to production-ready.
Chapter 1 (Docker Fundamentals) includes: Containers vs Virtual Machines; Docker Architecture; Docker Installation & Setup.
Containers share the host kernel; VMs include a full guest OS—containers start faster and use less overhead. Note: Expand this section with your own examples and production notes.
dockerd runs containers; containerd manages runtimes; images layer on union filesystems. Note: Expand this section with your own examples and production notes.
Chapter 2 (Working with Images) includes: Understanding Images; Building Custom Images (Dockerfile); Publishing to Registry.
Images are immutable templates; tags point to digests in registries. Note: Expand this section with your own examples and production notes.
Multi-stage builds shrink attack surface and image size. FROM node:20-alpine AS build WORKDIR /app COPY . . RUN npm ci && npm run build FROM nginx:alpine COPY --from=build /app/dist /usr/share/nginx/html Note: Expand this section with your own examples and production notes.
Chapter 3 (Running Containers) includes: Creating & Running Containers; Container Networking; Volume Management.
docker run starts containers; -d detaches; --rm cleans up on exit. Note: Expand this section with your own examples and production notes.
Bridge networks isolate apps; publish ports with -p host:container. Note: Expand this section with your own examples and production notes.
Chapter 4 (Best Practices) includes: Security; Performance Optimization; Resource Limits.
Run as non-root; scan images with Trivy; pin base image digests. Note: Expand this section with your own examples and production notes.
Order Dockerfile layers from least to most frequently changed. Note: Expand this section with your own examples and production notes.