feat(demo): add landing page with docs (#1951)

docs/app/blocks/components/md-block/md-block.component.ts

@@ -0,0 +1,23 @@
+/**
+ * @license
+ * Copyright Akveo. All Rights Reserved.
+ * Licensed under the MIT License. See License.txt in the project root for license information.
+ */
+
+import { ChangeDetectionStrategy, Component, Input } from '@angular/core';
+
+@Component({
+  selector: 'ngx-md-block',
+  template: `
+    <nb-card *ngFor="let section of source;" [ngxFragment]="section.fragment">
+      <nb-card-body>
+        <div [innerHtml]="section.html"></div>
+      </nb-card-body>
+    </nb-card>
+  `,
+  changeDetection: ChangeDetectionStrategy.OnPush,
+})
+export class NgxMdBLockComponent {
+
+  @Input() source: string;
+}