Isolating an application

An image is an immutable template and a container is a running instance. A Dockerfile describes the steps needed to build the image.

Docker
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containers · compose

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Isolating an application

An image is an immutable template and a container is a running instance. A Dockerfile describes the steps needed to build the image.

Start with a minimal example, observe the result, then change one thing at a time. This helps distinguish the intended rule from accidental behavior.

Key points

  • Choose explicit names.
  • Verify the result with a simple case.