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Update dockerfile to use nonroot user by default #373

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13 changes: 13 additions & 0 deletions Dockerfile
Original file line number Diff line number Diff line change
@@ -1,3 +1,8 @@
FROM ubuntu:22.10 AS user

# Create a nonroot user for final image
RUN useradd -u 10001 nonroot

FROM bitwalker/alpine-elixir:1.11.4 AS builder

# The following are build arguments used to change variable parts of the image.
Expand Down Expand Up @@ -102,4 +107,12 @@ COPY --from=cmd /go/bin/plural /usr/local/bin/plural
COPY --from=helm /usr/local/bin/goon /usr/local/bin/goon
COPY --from=builder /opt/built .

# Copy nonroot user and switch to it
COPY --from=user /etc/passwd /etc/passwd

RUN chown -R nonroot /opt/app
RUN chown -R nonroot /usr/local/bin

USER nonroot

CMD trap 'exit' INT; /opt/app/bin/${APP_NAME} foreground