Refactored startup. Updated usings. Removed dockerignore

Moonlight.ApiServer/Implementations/Startup/CoreStartup.cs

@@ -1,3 +1,7 @@
+using Microsoft.AspNetCore.Builder;
+using Microsoft.AspNetCore.Routing;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Hosting;
 using Microsoft.OpenApi.Models;
 using Moonlight.ApiServer.Configuration;
 using Moonlight.ApiServer.Database;