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/scripts/build.js

@@ -0,0 +1,5 @@
+const { build } = require('../dist/webpack-dev-env.js');
+const parseCliArgs = require('./utils/parseCliArgs.js');
+const { validateBuildOptions } = require('./utils/validateOptions.js');
+const options = validateBuildOptions(parseCliArgs(process.argv.slice(2)));
+build(options);