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/packages/scripts/templates/sitemap.ejs

@@ -0,0 +1,23 @@
+<% pages = pages || [] %>
+
+<% if (pages.length) { %>
+
+	<div id="app-header"></div>
+	<div id="app-sidebar"></div>
+
+	<div class="page-main-wrap">
+		<div class="page-main-inner">
+			<div class="custom-page-wrapper">
+				<h2>Sitemap</h2>
+				<hr>
+				<h3>Pages</h3>
+				<ol>
+					<% for (p of pages) { %>
+					<li><a href="./<%= p %>.html"><%= p %></a></li>
+					<% } %>
+				</ol>
+			</div>
+		</div>
+	</div>
+	
+<% } %>