Rootless container

[ghusta]

• https://docs.docker.com/engine/reference/builder/#user
• https://docs.docker.com/engine/reference/builder/#copy (COPY --chown)
• https://medium.com/redbubble/running-a-docker-container-as-a-non-root-user-7d2e00f8ee15
• https://docs.docker.com/build/building/best-practices/#user ⭐

[ghusta]

Example (with docker init) :

# Create a non-privileged user that the app will run under.
# See https://docs.docker.com/go/dockerfile-user-best-practices/
ARG UID=10001
RUN adduser \
    --disabled-password \
    --gecos "" \
    --home "/nonexistent" \
    --shell "/sbin/nologin" \
    --no-create-home \
    --uid "${UID}" \
    appuser
USER appuser