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
ARG GOPROXY=https://goproxy.cn,direct
ARG GOSUMDB=sum.golang.google.cn
ARG ALPINE_MIRROR=https://mirrors.aliyun.com/alpine

FROM ${GO_BUILDER_IMAGE} AS builder

ARG GOPROXY
ARG GOSUMDB
ENV GOPROXY=${GOPROXY}
ENV GOSUMDB=${GOSUMDB}

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}

ARG ALPINE_MIRROR
ENV TZ=Asia/Shanghai
RUN sed -i "s|https://dl-cdn.alpinelinux.org/alpine|${ALPINE_MIRROR}|g; s|http://dl-cdn.alpinelinux.org/alpine|${ALPINE_MIRROR}|g" /etc/apk/repositories \
	&& apk --no-cache add ca-certificates tzdata curl \
	&& ln -snf "/usr/share/zoneinfo/${TZ}" /etc/localtime \
	&& echo "${TZ}" >/etc/timezone

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"]