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في هذا الدرس

explain what problem containers solve and how they differ from VMs.

الموضوعات المخطط لها

• "Works on my machine" happens because machines differ; a container packs the app with its runtime and libraries.
• A container is an isolated process on the host's kernel; a VM runs a whole separate operating system.
• Containers start in seconds and use less memory than VMs.
• A container is not a security boundary as strong as a VM.
• Docker is the most common tool; the image format is a standard.