add first note of go

Hongyi Shen · Hongyi Shen · commit c7c750bf3f34 · 2018-05-17T17:03:43.000-07:00
diff --git a/Go_Index.md b/Go_Index.md
@@ -1 +1,4 @@
-notes coming...
+## Libraries
+### [gorm](https://godoc.org/github.com/jinzhu/gorm)
++ [Tutorial](http://doc.gorm.io/crud.html)
++ default value: `gorm:"default:18"`
