add vendor

vendor/github.com/gin-gonic/contrib/static/example/simple/example.go

@@ -0,0 +1,22 @@
+package main
+
+import (
+	"github.com/gin-gonic/contrib/static"
+	"github.com/gin-gonic/gin"
+)
+
+func main() {
+	r := gin.Default()
+
+	// if Allow DirectoryIndex
+	//r.Use(static.Serve("/", static.LocalFile("/tmp", true)))
+	// set prefix
+	//r.Use(static.Serve("/static", static.LocalFile("/tmp", true)))
+
+	r.Use(static.Serve("/", static.LocalFile("/tmp", false)))
+	r.GET("/ping", func(c *gin.Context) {
+		c.String(200, "test")
+	})
+	// Listen and Server in 0.0.0.0:8080
+	r.Run(":8080")
+}