Docker
Docker takes something people usually explain with a paragraph of jargon and makes it click with one picture: put your app in a box 📦, and that box runs the same everywhere. This course builds that picture up piece by piece — install it, run things, break things on purpose, then fix them.
Why Docker? Containers vs. VMs
The problem Docker solves, and how a container differs from a virtual machine.
→ 02Installing Docker & first commands
Get Docker running, and meet the daemon, CLI, and your first container.
→ 03Images vs. containers — core commands
run, ps, exec, logs, stop, rm — the commands you'll type a hundred times a day.
→ 04Docker Hub & registries
Where images actually live, how tags work, and pushing your own.
→ 05Writing a Dockerfile
Turn your own app into an image, layer by layer, with a multi-stage build.
→ 06Docker Compose
Run a whole app — API, database, cache — with one command.
→ 07Networking
How containers find and talk to each other, bridge vs. host networking.
→ 08Volumes & data persistence
Keeping data alive after a disposable container disappears.
→ 09Container lifecycle, restarts & limits
What state a container is actually in, restart policies, capping CPU/memory.
→ 10Debugging & troubleshooting
Your container crashed. Now what? A field guide to the usual suspects.
→ 11Best practices & security
The habits that separate a toy Dockerfile from a production one.
→ ✓Docker quiz
12 questions, straight from the 11 lessons above.
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