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/templates/config/core/url.config.js

@@ -0,0 +1,32 @@
+module.exports = {
+  home: './index.html',
+  search: './search.html',
+  latestMedia: './latest.html',
+  featuredMedia: './featured.html',
+  recommendedMedia: './recommended.html',
+  members: './members.html',
+  /* Error pages */
+  error404: './error.html',
+  /* Archive pages */
+  tags: './tags.html',
+  categories: './categories.html',
+  /* User pages */
+  likedMedia: './liked.html',
+  history: './history.html',
+  /* Add pages */
+  addMedia: './add-media.html',
+  /* Profile/account edit pages */
+  editProfile: './edit-profile.html',
+  editChannel: './edit-channel.html',
+  /* User account pages */
+  signin: './signin.html',
+  signout: './signout.html',
+  register: './register.html',
+  changePassword: './change-password.html',
+  /* Administration pages */
+  admin: '/admin',
+  /* Management pages */
+  manageMedia: './manage-media.html',
+  manageUsers: './manage-users.html',
+  manageComments: './manage-comments.html',
+};