FROM golang:alpine as builder
RUN adduser -D -g '' appuser
RUN mkdir /build 
ADD . /build/
WORKDIR /build 
RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -trimpath -gcflags 'all=-e' -ldflags "-s -w" -o main .
RUN apk add --no-cache ca-certificates
FROM scratch
COPY --from=builder /etc/passwd /etc/passwd
COPY --from=builder /etc/ssl/cert.pem /etc/ssl/cert.pem
COPY --from=builder /build/main /main
USER appuser
EXPOSE 8080
ENTRYPOINT ["/main"]