# 多阶段构建：静态编译 -> distroless，镜像极小、无 shell、攻击面小
FROM golang:1.23-alpine AS build
WORKDIR /src
COPY go.mod go.sum ./
RUN go mod download
COPY . .
RUN CGO_ENABLED=0 go build -ldflags="-s -w" -o /relay .

FROM gcr.io/distroless/static-debian12
COPY --from=build /relay /relay
EXPOSE 8443
ENTRYPOINT ["/relay"]
