# 多阶段构建：静态编译 -> distroless（无外部依赖，纯标准库）
FROM golang:1.23-alpine AS build
WORKDIR /src
COPY go.mod ./
COPY . .
RUN CGO_ENABLED=0 go build -ldflags="-s -w" -o /ddns .

FROM gcr.io/distroless/static-debian12
COPY --from=build /ddns /ddns
ENTRYPOINT ["/ddns"]
