What this snippet does
ADD auto-extracts local tar archives, which is the one behaviour COPY does not have.
Expected output
index.html style.css
Why practise typing this
Typing copy & add 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.
More Docker practice
- Copy to a directoryCOPY & ADD · beginner
- Copying a directory's contentsCOPY & ADD · intermediate
- Copy with ownershipCOPY & ADD · intermediate
- Copy from another imageCOPY & ADD · intermediate
- ADD with a remote URLCOPY & ADD · intermediate
- Copying with a wildcardCOPY & ADD · intermediate