Key Docker Concepts
- Dockerfile
- Docker can build images automatically by reading the instructions from a Dockerfile. A Dockerfile is a text document that contains all the commands a user could call on the command line to assemble an image.
- Docker Image
- An image is a filesystem and parameters to use at run time. It does not have a state and it never changes.
- Container
- A container is a running instance of an image.
- Data Volumes
- A data volume is a specially-designated directory within one or more containers that bypasses the Union File System.
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