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/vjs-plugin/config/rollup.config.js

@@ -0,0 +1,8 @@
+import rollup_builds from "./includes/rollup_builds";
+import pckg from '../package.json';
+
+const dists = rollup_builds( './src/index.js', "./out", pckg );
+
+export default [
+    dists.browser("./dist/mediacms-vjs-plugin.js")
+];