FROM --platform=$BUILDPLATFORM golang:1.25-alpine AS builder

ARG TARGETOS TARGETARCH

RUN apk add --no-cache tzdata

WORKDIR /app

COPY go.mod go.sum ./
RUN go mod download

COPY . .
RUN CGO_ENABLED=0 GOOS=$TARGETOS GOARCH=$TARGETARCH go build -ldflags="-s -w" -o /command-server .

FROM scratch

# 时区（固定 Asia/Shanghai）
ENV TZ=Asia/Shanghai
COPY --from=builder /usr/share/zoneinfo/Asia/Shanghai /etc/localtime

# CA 证书（HTTPS 请求必需）
COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/

COPY --from=builder /command-server /

EXPOSE 8000

ENTRYPOINT ["/command-server"]