What this snippet does
Without -p on docker run the port stays inside the container network, EXPOSE is metadata only.
Expected output
curl: (7) Failed to connect to localhost port 8080
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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