Gh pages deploy fix (#5669)

* fix(app):redirect after 404

* fix(app):docs building script

* fix(app):add gulpfile for docs

* fix(app): directory splitting

* fix(app): build docs script

* fix(app): build docs script

* fix(app): build docs script

* fix(app): relative path for scss

* fix(app): relative path for scss

* fix(app): relative path for scss

* fix(app):fix footer icons

* fix(app):fix footer icons

* fix(app):fix footer icons

* fix(app):config

* fix(app):remove small-social

* fix(docs): footer icons style

* fix(docs): material page index file

* fix(docs): descriptions and keyword

* fix(docs): og description

* fix(docs): og description and title

* fix(docs): dem,o branch url

* fix(docs): dynamic title for docs page

* fix(docs): remove unused script

* fix(docs): static title

Co-authored-by: Evgeny Lupanov <e.lupanov@akveo.com>

docs/app/@theme/components/docs-footer/footer.component.html

@@ -15,14 +15,20 @@
   <ul>
     <li><strong class="title">Follow Us</strong></li>
     <li class="social">
-      <a href="https://github.com/akveo/ngx-admin" target="_blank">
-        <i class="small-social-github"></i>
+      <a href="https://github.com/akveo/ngx-admin"
+         aria-label="github"
+         target="_blank">
+        <i [innerHTML]="'github-outline' | eva: { width: 30, height: 30, fill: '#f7f8fa' }"></i>
       </a>
-      <a href="https://twitter.com/akveo_inc" target="_blank">
-        <i class="small-social-twitter"></i>
+      <a href="https://twitter.com/akveo_inc"
+         aria-label="twitter"
+         target="_blank">
+        <i [innerHTML]="'twitter' | eva: { width: 30, height: 30, fill: '#f7f8fa' }"></i>
       </a>
-      <a href="https://www.facebook.com/akveo" target="_blank">
-        <i class="small-social-facebook"></i>
+      <a href="https://www.facebook.com/akveo"
+         aria-label="facebook"
+         target="_blank">
+        <i [innerHTML]="'facebook' | eva: { width: 35, height: 35, fill: '#f7f8fa' }"></i>
       </a>
     </li>
     <li class="copy">