chore: add backup app

pkg/core/backup/ping/ping.go

@@ -0,0 +1,18 @@
+// Package ping provides ...
+package ping
+
+import (
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+)
+
+// RegisterRoutes register routes
+func RegisterRoutes(group gin.IRoutes) {
+	group.GET("/ping", handlePing)
+}
+
+// handlePing ping
+func handlePing(c *gin.Context) {
+	c.String(http.StatusOK, "it's ok")
+}