Docker
Dockerfile
A Dockerfile is a text specification of instructions used to build a container image. It defines base images, copied files, build commands, and runtime settings; instruction ordering influences cache reuse and the resulting image contents.
Why it matters
Instruction order affects image content, cache behavior, and accidental secret retention.
Practical example
Copy dependency manifests before application source so dependency installation can remain cached across source-only changes.
Related terms
Sources
Definition reviewed .
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