BUILDX uses the following files to perform the build process:
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Dockerfile is the input file to the build process.
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STDOUT is the Standard Output file for the build process.
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STDERR is the Standard Error file for the external process to report errors.
DOCKERFILE, STDOUT, and STDERR files default to disk files with a FILESTRUCTURE of STREAM.
The BUILDX utility supports MCP-specific directives within the Dockerfile.
