Go - Minimal Docker image with librdkafka dependency

go-librdkafka.Dockerfile

ARG USER=nobody

# build image
FROM golang:1.21-alpine AS builder

ENV PATH="/go/bin:${PATH}"
ENV CGO_ENABLED=1
ENV GOOS=linux
ENV GOARCH=amd64

RUN apk --no-cache add ca-certificates bash sudo pkgconf git build-base

WORKDIR /go/src

COPY . .

RUN git clone https://github.com/confluentinc/librdkafka.git && \
    cd librdkafka && \
    ./configure --prefix /usr && \
    make && \
    make install

RUN go build -tags musl --ldflags "-s -w -extldflags -static" -o app .

# final image
FROM scratch

COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
COPY --from=builder /go/src/app /

USER $USER
ENTRYPOINT ["/app"]