Focused hands-on problems designed to help you hone your DevOps or Server Side skills. Some challenges are more educational, while others are based on real-world scenarios. The platform provides hints and feedback for each challenge, including automated solution checks.
Learn how to build and publish an uncompressed container image - a helpful trick to optimize disk I/O for large images, especially when you can benefit from a fast internal network.
Learn how to build a secure, lightweight, and production-ready container image for a statically linked Go application by following this hands-on challenge full of practical tips and tricks.
Learn how to build a secure, lightweight, and production-ready Node.js container image for a SvelteKit application by following this hands-on challenge full of practical tips and tricks.
Learn how to build a secure, lightweight, and production-ready Node.js container image for a Nuxt application by following this hands-on challenge full of practical tips and tricks.
Can you make a container exit gracefully after the 'docker stop' command while preserving its extensible entrypoint mechanism?
Learn how to build a secure, lightweight, and production-ready Node.js container image for a Next.js application by following this hands-on challenge full of practical tips and tricks.
Learn how to copy all image tags from one repository to another in an efficient way.
Learn how to copy a multi-platform image from one repository to another using the docker manifest command or other, more convenient, tools like crane, skopeo, or regctl.
Learn how to copy a container image from one repository to another without using Docker, Podman, or any other container runtime.
Can you unpack the filesystem of a container image into a local directory?
Learn on practice the limitations of FROM scratch images and the ways to mitigate them.
Learn a trick or two about container image labels and how to read them with ctr.