Refactored startup. Removed unused usings. Improved nuget package building. Switched to yaml for configuration. Moved asset files. Set correct context type for oauth2 pages. Updated versions

Moonlight.ApiServer/Services/ApiKeyService.cs

@@ -1,6 +1,5 @@
 using System.IdentityModel.Tokens.Jwt;
 using System.Text;
-using System.Text.Json;
 using Microsoft.IdentityModel.Tokens;
 using MoonCore.Attributes;
 using Moonlight.ApiServer.Configuration;