permission-issue-in-container.md

Preventing permission issue in Docker created files

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# Dockerfile
ARG USER_ID
ARG GROUP_ID

RUN addgroup --gid $GROUP_ID user
RUN adduser --disabled-password --gecos '' --uid $USER_ID --gid $GROUP_ID user
USER user

when building

docker build -t image:tag . --build-arg USER_ID=$(id -u) --build-arg GROUP_ID=$(id -g)