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Attempting to Copy file that is excluded by .dockerignore.
PropertyValue
SeverityWarning
CategoryCorrectness
DefaultEnabled

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Description

When you use the ADD or COPY instructions in a Dockerfile, you should ensure that the files to be copied into the image do not match a pattern present in .dockerignore. Files which match the patterns in a .dockerignore file are not present in the context of the image when it is built. Trying to copy or add a file which is missing from the context will result in a build error.

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Examples

Given a .dockerignore containing */tmp/*: Bad: 
FROM scratch
COPY ./tmp/helloworld.txt /helloworld.txt
Good: 
FROM scratch
COPY ./forever/helloworld.txt /helloworld.txt

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Reference