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# STEP 1 build executable binary
FROM golang:1.14-alpine AS build-env
# Create new user devops
ENV USER=devops
ENV UID=10001
RUN adduser \
--disabled-password \
--gecos "" \
--home "/nonexistent" \
--shell "/sbin/nologin" \
--no-create-home \
--uid "${UID}" \
"${USER}"
# Get git.
RUN apk update && apk add --no-cache git
WORKDIR /go/src/app
# Add source code.
COPY src/ ./
# Get the dependencies.
RUN go get -d -v
# Build the binary.
RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build \
-ldflags='-w -s -extldflags "-static"' -a \
-o /go/bin/app .
# STEP 2 build a small image
#FROM scratch
FROM gcr.io/distroless/static
ENV TZ=America/Toronto
COPY --from=build-env /etc/passwd /etc/passwd
COPY --from=build-env /etc/group /etc/group
COPY --from=build-env /go/bin/app /go/bin/app
# Use an unprivileged user.
USER devops:devops
#CMD ["/go/bin/app"]
ENTRYPOINT ["/go/bin/app"]
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