Base Url Support (#642)

* Added base url config

* UI side is not working

* Working base url more

* Attempt to get UI to work with base url

* Implemented the ability to set the Base URL for the app

* Hooked in Base URL as a managed setting

* Ensure we always start with / for base url

* Removed default base href from debug builds. Cleaned up an issue with base url migration.

* Fixed an issue with our BaseURL migration

API/Entities/Enums/ServerSettingKey.cs

@@ -21,7 +21,9 @@ namespace API.Entities.Enums
         [Description("EnableOpds")]
         EnableOpds = 7,
         [Description("EnableAuthentication")]
-        EnableAuthentication = 8
+        EnableAuthentication = 8,
+        [Description("BaseUrl")]
+        BaseUrl = 9
 
     }
 }