added example files

dist/domain/services/MusicCatalogService.js

@@ -0,0 +1,24 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+var MusicCatalogService = /** @class */ (function () {
+    function MusicCatalogService(repository) {
+        this.repository = repository;
+    }
+    MusicCatalogService.prototype.get = function () {
+        return this.repository.get();
+    };
+    MusicCatalogService.prototype.getById = function (id) {
+        return this.repository.getById(id);
+    };
+    MusicCatalogService.prototype.add = function (track) {
+        return this.repository.add(track);
+    };
+    MusicCatalogService.prototype.edit = function (id, track) {
+        return this.repository.edit(id, track);
+    };
+    MusicCatalogService.prototype.delete = function (id) {
+        return this.repository.delete(id);
+    };
+    return MusicCatalogService;
+}());
+exports.MusicCatalogService = MusicCatalogService;