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When adding supply recordsdata from the build context, their paths are interpreted asrelative to the foundation of the context. If you specify a relative path leadingoutside of the construct context, corresponding to ADD ../something /something, parentdirectory paths are stripped out automatically. The effective supply path inthis example becomes ADD something /something. The ENV instruction sets the surroundings variable to the worth. This worth will be within the surroundings for all subsequent instructionsin the build stage and might bereplaced inline inmany