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/src/static/js/utils/contexts/UserContext.js

@@ -0,0 +1,22 @@
+import React, { createContext } from 'react';
+import { config as mediacmsConfig } from '../settings/config.js';
+
+export const UserContext = createContext();
+
+const member = mediacmsConfig(window.MediaCMS).member;
+
+export const UserProvider = ({ children }) => {
+  const value = {
+    isAnonymous: member.is.anonymous,
+    username: member.username,
+    thumbnail: member.thumbnail,
+    userCan: member.can,
+    pages: member.pages,
+  };
+
+  return <UserContext.Provider value={value}>{children}</UserContext.Provider>;
+};
+
+export const UserConsumer = UserContext.Consumer;
+
+export default UserContext;