Containerfile

From John Freier
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Containerfile and Dockerfile are interchangeable for the most part.

OCI prefers the generic term Containerfile.

WORKDIR

This set the working directory, it will also create the directory if it doesn't exists.

 WORKDIR /opt

COPY

This will copy a file from the local host to the container.

 COPY app.tar /app
  • user ADD if you want to have more options, like auto extract and git pulls.

ENV

To set an environment variable.

 ENV EXAMPLE=/opt/example
 ENV APP_PROFILE=dev