What this snippet does
--no-cache skips writing the package index, saving a few megabytes and a cleanup step.
Expected output
myapp latest 12.4MB
Why practise typing this
Typing image optimisation 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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