DevOps tutorials for people who want an app to run the same way on every machine, not only on the one it was written on. Learn what each command does before you trust it. A copied command runs just as happily when it is wrong.
Faster builds, safer images, and containers you can run under load without guessing what fails first. You will cut rebuild times with cache mounts and multi-stage builds, run as non-root on a read-only filesystem, set limits and health checks that mean something, keep logs and registry tokens under control, and deploy a new version on one host without dropping requests. Skip this and the containers work fine right up to the day the disk fills, the memory runs out or a deployment drops a customer's request.
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