refactoring of note deletion

src/entities/entity.js

@@ -1,6 +1,7 @@
 "use strict";
 
 const utils = require('../services/utils');
+const repository = require('../services/repository');
 
 class Entity {
     constructor(row) {
@@ -10,6 +11,10 @@ class Entity {
             this[key] = row[key];
         }
     }
+
+    async save() {
+        await repository.updateEntity(this);
+    }
 }
 
 module.exports = Entity;