adjustments to config and cleanup nuget, remove implicit usings

MareSynchronosServer/MareSynchronosServices/Startup.cs

@@ -5,7 +5,11 @@ using MareSynchronosServices.Metrics;
 using MareSynchronosServices.Services;
 using MareSynchronosShared.Authentication;
 using MareSynchronosShared.Data;
+using Microsoft.AspNetCore.Builder;
+using Microsoft.AspNetCore.Hosting;
 using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.DependencyInjection;
 using Prometheus;
 
 namespace MareSynchronosServices;