What this snippet does
A digest pins the exact image content, making builds reproducible even if the tag is republished.
Expected output
Successfully built 1b8e4d2c7a90
Why practise typing this
Typing base images 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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