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>

angular.json

@@ -13,7 +13,6 @@
           "options": {
             "aot": true,
             "preserveSymlinks": true,
-            "rebaseRootRelativeCssUrls": true,
             "outputPath": "dist",
             "index": "src/index.html",
             "main": "src/main.ts",