refactor: general-node and map-node to use flotte types for service registration

internal/reduce-node/routes.go

@@ -0,0 +1,14 @@
+package reducenode
+
+import "github.com/gin-gonic/gin"
+
+func registerRoutes(router *gin.Engine) *gin.Engine {
+
+	router.GET("/ping", func(c *gin.Context) {
+		c.JSON(200, gin.H{
+			"message": "pong",
+		})
+	})
+
+	return router
+}