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Run app with non-root user; fix #100 #432

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Run app with non-root user; fix #100 #432

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7 changes: 7 additions & 0 deletions Dockerfile
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Original file line number Diff line number Diff line change
Expand Up @@ -2,6 +2,10 @@
ARG GO_VERSION=1.17
FROM golang:${GO_VERSION}-alpine as build

# empty dir and /etc/passwd file to run transfer with unprivileged user
RUN install -g nobody -o nobody -m 0770 -d /tmp/empty-dir-owned-by-nobody
RUN echo 'nobody:x:65534:65534:nobody:/:/sbin/nologin' > /tmp/passwd

# Necessary to run 'go get' and to compile the linked binary
RUN apk add git musl-dev

Expand All @@ -17,9 +21,12 @@ RUN CGO_ENABLED=0 go build -tags netgo -ldflags "-X github.com/dutchcoders/trans
FROM scratch AS final
LABEL maintainer="Andrea Spacca <andrea.spacca@gmail.com>"

COPY --chown=65534:65534 --from=build /tmp/empty-dir-owned-by-nobody /tmp
COPY --from=build /tmp/passwd /etc/passwd
COPY --from=build /go/bin/transfersh /go/bin/transfersh
COPY --from=build /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/ca-certificates.crt

USER nobody
ENTRYPOINT ["/go/bin/transfersh", "--listener", ":8080"]

EXPOSE 8080