major refactoring

added universal
added api

src/main.ts

@@ -0,0 +1,14 @@
+import { enableProdMode } from '@angular/core';
+import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
+
+import { AppModule } from './app/app.module';
+import { environment } from './environments/environment';
+
+if (environment.production) {
+  enableProdMode();
+}
+
+document.addEventListener('DOMContentLoaded', () => {
+  platformBrowserDynamic().bootstrapModule(AppModule)
+  .catch(err => console.error(err));
+});