Context outside the Dockerfile in Docker

What this snippet does

COPY cannot escape the build context, so parent-directory paths always fail.

Expected output

ERROR: forbidden path outside the build context: ../config.json

Why practise typing this

Typing dockerfile basics code builds muscle memory for the symbols and indentation Docker uses most, which prose-based typing tests never cover. DevType measures your words per minute and accuracy on this snippet and tracks the individual characters you mistype, so later lessons can target them.

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