Update preface.md

添加在线预览
2016-10-08 10:10:11 +08:00 · 2016-10-08 10:10:11 +08:00 · 45e025d098
parent a545f79b64
commit 45e025d098
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--- a/preface.md
+++ b/preface.md
@ -17,6 +17,7 @@ Go语言圣经 [《The Go Programming Language》](http://gopl.io) 中文版本
 - http://2goo.info/media/html/gopl-zh-gh-pages/
 - http://docs.plhwin.com/gopl-zh/
 - http://gopl-zh.simple-is-best.tk/
+- https://docs.hacknode.org/gopl-zh/

 {% include "./version.md" %}