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Docker

Docker from your first container to a Compose file you can explain. Start here if you have never run one.

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Docker Intermediate: Images and Compose That Survive Real Projects Level: Intermediate

Dockerfiles that don't rot, volumes and networks you can explain, and Compose files other people can run. You will shrink a build context, fix permission errors, wire services together with health checks and push an image to a registry. If you skip the checks on ports, secrets and tags, the project runs on your laptop and breaks on the next machine.