Hi all,
I am having troubles understanding build arguments.
I build the image with:
docker build -t mycaddy --build-arg x=zzzz ./
My Dockerfile (to test):
FROM alpine
RUN echo ${x} # nothing
ARG x=test
RUN echo ${x} # nothing
ENV y=${x}
RUN echo ${y} # this shows zzzz
How can I access x without setting another environment variable y? Thanks !!