fix

main.go

@@ -2,15 +2,18 @@ package main
 
 import (
 	"net/http"
+	"strconv"
 
 	"github.com/gin-gonic/gin"
 )
 
 func main() {
 	router := gin.Default()
+	version := 1
 	router.GET("/ping/:name", func(c *gin.Context) {
 		c.JSON(http.StatusOK, gin.H{
 			"message": "pong " + c.Params.ByName("name"),
+			"version": "v" + strconv.Itoa(version),
 		})
 	})