🚀 Free course

Deployment & Ops

Ship it, keep it up, and know within a minute when it breaks.

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What you will learn

1. What "deploying" means: build, artifact, environment (coming soon)
2. DNS end to end — A records, CNAME, TTL
   Your DNS change is correct and the site still shows the old page. Nothing is broken — something is remembering.
3. HTTPS and certificates — what actually gets verified
   A certificate does not prove a site is safe. It proves the server you reached controls the name you typed — and it is strict about which names.
4. Static hosting and the CDN edge (coming soon)
5. Cache-Control — the header that decides if users see your fix
   Caching is the fastest optimisation there is and the most expensive mistake. The difference is one header, decided once, at deploy time.
6. Environments, config and secrets (coming soon)
7. CI/CD: what runs on every push (coming soon)
8. Containers: images, layers, and why yours is 1.2GB (coming soon)
9. Rollback, blue-green and canary (coming soon)
10. Monitoring, alerting and the on-call contract (coming soon)
11. Reading a production incident (coming soon)
12. Cost: the bill as an engineering signal (coming soon)

How the course works

• Each chapter is a short book: the basics, the explanation in several ways, the words to know, and a two-minute summary.
• Then you test yourself — quiz, puzzles — and recall it on two different days, so it stays.
• Blinks (one idea per screen), games and a daily plan keep you coming back. It is free.