FROM golang:alpine
ARG VERSION
RUN mkdir /build 
ADD . /build/
WORKDIR /build 
RUN CGO_ENABLED=0 GOOS=linux go build -a -gcflags '-e' -ldflags "-X main.version=$VERSION -s -w" -o main .
RUN echo -e "root:x:0:0:root:/:\nappuser:x:1000:1000:appuser:/:" > /etc/passwd
RUN echo -e "root:x:0:root\nappuser:x:1000:" > /etc/group
FROM scratch
COPY --from=0 /build/main /
COPY --from=0 /etc/passwd /etc/
COPY --from=0 /etc/group /etc/
USER appuser
EXPOSE 8080
ENTRYPOINT ["/main"]