Are Docker Images free to download?

Yes, downloading public open-source images from Docker Hub is completely free. However, Docker Hub does impose 'Rate Limits' on free anonymous users (e.g., 100 pulls per 6 hours) to prevent automated abuse.

Can I host my own Private Registry?

Yes! Docker actually provides an official image called `registry`. You can run this image on your own private server to host a completely self-managed, free private registry without paying AWS or Google.

What does 'Alpine' mean in a tag like `node:18-alpine`?

Alpine is a highly stripped-down, security-focused Linux distribution. A standard `node` image might be 1GB in size because it includes a full Debian OS. The `node:18-alpine` image might only be 100MB. Professional developers prefer Alpine images to keep network transfer times fast and reduce the attack surface area for hackers.

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Docker Hub & Registries

Explore the global ecosystem of Docker Images. Learn how to navigate Docker Hub, identify secure Official Images, pin versions using Tags, and protect proprietary code using Private Registries like AWS ECR.

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