Started with about page and my cv

src/app/constants/LocalStoreConstants.ts

@@ -0,0 +1,7 @@
+export class LocalStoreConstants {
+
+  static readonly THEME_KEY  = 'theme';
+  static readonly LANGUAGE_KEY  = 'lang';
+
+  static readonly RELOAD_ALL_LANG_LISTENER_KEY = 'language_dirty_flag';
+}