What this snippet does
A wrapper script can do setup then exec "$@" so the real process inherits PID 1.
Expected output
migrations applied app listening on :8080
Why practise typing this
Typing cmd & entrypoint 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
- Exec form vs shell formCMD & ENTRYPOINT · intermediate
- Shell form swallows signalsCMD & ENTRYPOINT · intermediate
- Overriding CMD at run timeCMD & ENTRYPOINT · beginner
- Overriding ENTRYPOINTCMD & ENTRYPOINT · intermediate
- CMD ignored when args are passedCMD & ENTRYPOINT · intermediate
- Forgetting exec in the wrapperCMD & ENTRYPOINT · advanced