I want to notice that I forgot to specify arg when building Docker

Forget to specify arg in Docker build today as well as today. Moreover, since it is a base Docker image, you have to rebuild multiple container images. ..

For those who have the same experience as me. Make sure you get an error when building Docker.

■ Method Dockerfile ARG MY_VARIABLE RUN test -n "$ MY_VARIABLE" ← If the length of MY_VARIABLE is 0 like this, the command will fail.

■ Remarks Useless layers will increase If possible, I would like an option that can officially make an error in the Docker build.

■ Reference https://stackoverflow.com/questions/38438933/how-to-make-a-build-arg-mandatory-during-docker-build https://www.atmarkit.co.jp/ait/articles/1807/05/news041.html

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