Challenge on ,
Secure a Container Registry with Authentication and TLS
Set up your own OCI-compatible container registry with username/password authentication and HTTPS - the kind of protection you'd expect before using a registry in production.
Challenges
Focused, hands-on problems for sharpening your DevOps and server-side skills. Some teach specific concepts while others mirror real-world scenarios. Every challenge includes hints, feedback, and automated solution checks.
Challenge on , ,
A Simple Sandbox Breakout: Spot It and Stop It
Investigate a potentially compromised CI host. A sandboxed "agent" running in the background is suspected of breaking out - confirm the breach and neutralize it without taking the sandbox down.
Challenge on ,
Install a Private npm Package in a Dockerfile Without Leaking Credentials
Build a container image for a Node.js app that uses a private npm package without leaking the registry credentials into the image layers.