Frontent dev env (#247)

* Added frontend development files/environment

* More items-categories related removals

* Improvements in pages templates (inc. static pages)

* Improvements in video player

* Added empty home page message + cta

* Updates in media, playlist and management pages

* Improvements in material icons font loading

* Replaced media & playlists links in frontend dev-env

* frontend package version update

* chnaged frontend dev url port

* static files update

* Changed default position of theme switcher

* enabled frontend docker container

frontend/config/templates/renderPageContent.ejs

@@ -0,0 +1,15 @@
+<% if (page) { %>
+
+	import { renderPage } from './static/js/utils/renderer';
+
+	<% if (page.component) { %>
+
+		import { <%= page.component %> } from './static/js/pages/<%= page.component %>';
+
+		<% if (page.id) { %>
+			renderPage( '<%= page.id %>', <%= page.component %> );
+		<% } %>
+
+	<% } %>
+	
+<% } %>