go gopath配置

cannot find package "github.com/go-playground/validator/v10" in any of:
    /home/thk/local/go/src/vendor/github.com/go-playground/validator/v10 (vendor tree)
    /home/thk/local/go/src/github.com/go-playground/validator/v10 (from $GOROOT)
    ($GOPATH not set. For more details see: 'go help gopath')

看图

注意第一个 是安装路径

第二个是 工程路径