golang multi-stage build에서 scratch를 사용할 때 시간대를 설정하는 방법

Dockerfile example

FROM golang:1.14.2-alpine3.11 AS builder
RUN apk --update-cache add tzdata
WORKDIR $GOPATH/src/mypackage/myapp/
COPY . .
RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -ldflags="-w -s" -o /go/bin/myapp

FROM scratch
COPY --from=builder /usr/share/zoneinfo /usr/share/zoneinfo
COPY --from=builder /usr/local/go/lib/time/zoneinfo.zip /usr/local/go/lib/time/zoneinfo.zip
COPY --from=builder /go/bin/myapp /go/bin/myapp
ENV TZ=Asia/Tokyo
ENTRYPOINT ["/go/bin/myapp"]

COPY --from=build-stage /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/ca-certificates.crt

-ldflags="-w -s"