📦 build(Dockerfile): 优化构建配置并添加国内代理

- 在 builder 和 lint 阶段均添加 GOPROXY 环境变量以加速依赖下载
- 使用国内镜像源（goproxy.cn 和 mirrors.aliyun.com）提升构建速度
- 调整文件复制命令的格式以保持一致性

Dockerfile

@@ -3,15 +3,19 @@ ARG GOLANG_CI_LINT_VERSION
 FROM registry-vpc.cn-beijing.aliyuncs.com/d8dcloud/go:1.23 as builder  
 ENV PATH /go/bin:/usr/local/go/bin:$PATH  
 ENV GOPATH /go  
-COPY . /go/src/github.com/virtual-kubelet/alibabacloud-eci  
-WORKDIR /go/src/github.com/virtual-kubelet/alibabacloud-eci  
+COPY . /go/src/github.com/virtual-kubelet/alibabacloud-eci
+WORKDIR /go/src/github.com/virtual-kubelet/alibabacloud-eci
+# 设置 Go 国内代理加速
+RUN go env -w GOPROXY=https://goproxy.cn,https://mirrors.aliyun.com/goproxy/,direct
 RUN make build  
 RUN cp bin/virtual-kubelet /usr/bin/virtual-kubelet  
   
-FROM registry-vpc.cn-beijing.aliyuncs.com/d8dcloud/golangci/golangci-lint:${GOLANG_CI_LINT_VERSION} as lint  
-WORKDIR /app  
-COPY go.mod ./  
-COPY go.sum ./  
+FROM registry-vpc.cn-beijing.aliyuncs.com/d8dcloud/golangci/golangci-lint:${GOLANG_CI_LINT_VERSION} as lint
+WORKDIR /app
+# 设置 Go 国内代理加速
+RUN go env -w GOPROXY=https://goproxy.cn,https://mirrors.aliyun.com/goproxy/,direct
+COPY go.mod ./
+COPY go.sum ./
 RUN \  
     --mount=type=cache,target=/root/.cache/go-build \  
     --mount=type=cache,target=/go/pkg/mod \