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add nonroot account to scratch container #41

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Merged
actualben merged 3 commits into from
Jan 21, 2026
Merged

add nonroot account to scratch container #41

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dd291ee
add nonroot account to scratch container
actualben Jan 21, 2026
2315c29
update workflow with standard build args and explicitly set provenanc…
actualben Jan 21, 2026
db9dbfc
adding sbom: true to docker build
actualben Jan 21, 2026
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12 changes: 10 additions & 2 deletions .github/workflows/release.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -136,9 +136,17 @@ jobs:
with:
push: true
context: .
tags: ${{ steps.meta.outputs.tags }}
labels: |
tags: |-
${{ steps.meta.outputs.tags }}
labels: |-
${{ steps.meta.outputs.labels }}
build-args: |-
COMMIT_SHA=${{ github.sha }}
GITHUB_TAG=${{ github.ref_name }}
GIT_COMMIT=${{ github.sha }}
GIT_TAG=${{ github.ref_name }}
provenance: mode=max
sbom: true
platforms: linux/amd64,linux/arm64,linux/arm
cache-from: type=gha
cache-to: type=gha,mode=max
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16 changes: 16 additions & 0 deletions Dockerfile
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Original file line number Diff line number Diff line change
@@ -1,5 +1,7 @@
FROM alpine:edge AS dist
ARG TARGETARCH TARGETOS
ARG NONROOT_UID=65532
ARG NONROOT_GID=65532

# hadolint ignore=DL3018
RUN apk add --no-cache ca-certificates
Expand All @@ -8,10 +10,24 @@ RUN apk add --no-cache ca-certificates
COPY dist/registryproxy_${TARGETOS}_${TARGETARCH}_*/registryproxy* /
RUN chmod +x /registryproxy;

# create the 'nonroot' account
RUN set -eux; \
etc_build="/build/etc"; \
mkdir -p "$etc_build"; \
writeto() { output_file=$1; shift; printf '%s\n' "$*" >>"$output_file"; }; \
writeto "${etc_build}/passwd" "nonroot:x:${NONROOT_UID}:${NONROOT_GID}:nonroot:/home/nonroot:/sbin/nologin"; \
writeto "${etc_build}/shadow" "nonroot:*:18313:0:99999:7:::"; \
writeto "${etc_build}/group" "nonroot:x:${NONROOT_GID}:"; \
writeto "${etc_build}/gshadow" "nonroot:::"; \
:

FROM scratch
LABEL maintainer="Backplane BV <backplane@users.noreply.github.com>"

COPY --from=dist /build/etc/* /etc/
COPY --from=dist /etc/ssl /etc/ssl/
COPY --from=dist /registryproxy /

USER nonroot

ENTRYPOINT [ "/registryproxy" ]
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