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/mediacms.config.html.js

@@ -0,0 +1,44 @@
+module.exports = {
+  head: {
+    meta: [
+      { charset: 'utf-8' },
+      { content: 'ie=edge', 'http-equiv': 'x-ua-compatible' },
+      { name: 'viewport', content: 'width=device-width, initial-scale=1' },
+      { name: 'theme-color', content: '#fafafa' },
+      { name: 'msapplication-TileColor', content: '#fafafa' },
+      { name: 'msapplication-config', content: 'favicons/browserconfig.xml' },
+    ],
+    links: [
+      /**
+       * Manifest file link.
+       */
+      { rel: 'manifest', href: 'static/favicons/site.webmanifest' },
+      /**
+       * Favicon links.
+       */
+      { rel: 'apple-touch-icon', sizes: '180x180', href: 'static/favicons/apple-touch-icon.png' },
+      { rel: 'icon', type: 'image/png', sizes: '32x32', href: 'static/favicons/favicon-32x32.png' },
+      { rel: 'icon', type: 'image/png', sizes: '16x16', href: 'static/favicons/favicon-16x16.png' },
+      { rel: 'mask-icon', href: 'static/favicons/safari-pinned-tab.svg', color: '#fafafa' },
+      { rel: 'shortcut icon', href: 'static/favicons/favicon.ico' },
+      /**
+       * Stylesheet links
+       */
+      { rel: 'preload', href: 'static/css/_extra.css', as: 'style' },
+      { rel: 'stylesheet', href: 'static/css/_extra.css' },
+
+      // 'https://fonts.googleapis.com/icon?family=Material+Icons',
+      { rel: 'preload', href: 'static/lib/material-icons/material-icons.css', as: 'style' },
+      { rel: 'stylesheet', href: 'static/lib/material-icons/material-icons.css' },
+
+      // 'https://fonts.googleapis.com/css?family=Roboto:300,300i,400,400i,500,500i,700,700i&display=swap
+      { rel: 'preload', href: 'static/lib/gfonts/gfonts.css', as: 'style' },
+      { rel: 'stylesheet', href: 'static/lib/gfonts/gfonts.css' },
+    ],
+    scripts: [],
+  },
+  body: {
+    scripts: [],
+    snippet: '',
+  },
+};