Run apps with Docker Path

Docker without the buzzwords Understand what Docker actually is and does (images, containers, Dockerfiles, ports, volumes, and Compose) without the enterprise hype. 5 min
Images, containers, and Dockerfiles The recipe, the snapshot, and the running instance: what an image, a container, and a Dockerfile actually are, and how docker build and docker run connect them. 12 min
Write your first Dockerfile A real working Dockerfile for a Node and Express app, every instruction explained, plus .dockerignore and the node_modules trap. 12 min
Docker ports, volumes, and environment variables The three Docker settings that break most beginner setups, and exactly what 3000:3000 really means. 13 min
Run multiple services with Docker Compose One file to start a Node API, PostgreSQL, and Redis together, with the networks, volumes, and env vars wired up. 10 min
Keep your data with Docker volumes Why containers are disposable but your data should not be, named volumes versus bind mounts, and how to reset a database on purpose instead of by accident. 12 min
Connect containers with Docker networking Why localhost means something different inside a container, how Compose service names work, and the API connection bugs that follow. 11 min
Containerize a full-stack app How Docker fits a real app with a frontend, a Node backend, Postgres, and Redis, and why the frontend is often Dockerized for dev but shipped as static files. 12 min
Prepare a Docker image for production Multi-stage builds, smaller images, non-root users, health checks, restart policies, and secrets, and why npm run dev is not a production command. 15 min
Debug a Docker container A practical survival guide for Docker problems: ps, logs, exec, inspect, rebuilding without cache, and reasoning through it built but does not work. 13 min