stub out angular app with webpack 4

src/app/vault/vault.component.ts

@@ -0,0 +1,11 @@
+import {
+    Component,
+} from '@angular/core';
+
+@Component({
+    selector: 'app-vault',
+    templateUrl: 'vault.component.html',
+})
+export class VaultComponent {
+
+}