Golang Getting started - based on roll dice service and Automatic Ins…

…trumentation

content/en/docs/instrumentation/go/getting-started.md

@@ -31,19 +31,22 @@ directory[^1].
 ```go
 package main
 
-// Fibonacci returns the n-th Fibonacci number.
-func Fibonacci(n uint) (uint64, error) {
-	if n <= 1 {
-		return uint64(n), nil
-	}
+import (
+	"github.com/gin-gonic/gin"
+	"math/rand"
+	"net/http"
+)
 
-	var n2, n1 uint64 = 0, 1
-	for i := uint(2); i < n; i++ {
-		n2, n1 = n1, n1+n2
-	}
+func main() {
+	r := gin.Default()
 
-	return n2 + n1, nil
+	r.GET("/rolldice", func(c *gin.Context) {
+		c.AsciiJSON(http.StatusOK, rand.Intn(5)+1)
+	})
+
+	r.Run()
 }
+
 ```
 
 With your core logic added, you can now build your application around it. Add a