chore: not using goproxy by default (#4613)

tools/goctl/test/integration/model/mongo/Dockerfile

@@ -1,7 +1,9 @@
 FROM golang:1.22-alpine
 
-ENV TZ Asia/Shanghai
-ENV GOPROXY https://goproxy.cn,direct
+# set timezone if you need
+# ENV TZ Asia/Shanghai
+# if you are in China, you can use the following command to speed up the download
+# ENV GOPROXY https://goproxy.cn,direct
 
 WORKDIR /app
 COPY goctl /usr/bin/

tools/goctl/test/integration/model/mongo/cmd.sh

@@ -23,7 +23,7 @@ if [ $? -ne 0 ]; then
 fi
 
 # go mod tidy
-GOPROXY=https://goproxy.cn && go mod tidy
+go mod tidy
 
 # code inspection
 go test -race ./...