ARG GO_BUILDER_IMAGE=docker.m.daocloud.io/library/golang:1.26-alpine
ARG BACKEND_RUNTIME_IMAGE=docker.m.daocloud.io/library/alpine:3.22

FROM ${GO_BUILDER_IMAGE} AS builder

WORKDIR /app

# 复制 Go 依赖文件 / Copy Go dependency files
COPY backend/go.mod backend/go.sum ./
RUN go mod download

COPY backend ./backend
WORKDIR /app/backend

# 构建 Go 二进制文件 / Build Go binary
RUN CGO_ENABLED=0 GOOS=linux go build -o /server ./cmd/server

# 最终运行镜像 / Runtime image
FROM ${BACKEND_RUNTIME_IMAGE}

RUN apk --no-cache add ca-certificates tzdata curl

WORKDIR /app

COPY --from=builder /server ./server
# 暴露服务端口 / Expose service port
EXPOSE 8080

# 启动服务 / Run server
CMD ["./server"]