add a bunch of stuff copied from Foxchat.NET

Foxnouns.Backend/Program.cs

@@ -1,6 +1,8 @@
+using Foxnouns.Backend;
 using Foxnouns.Backend.Database;
 using Serilog;
 using Foxnouns.Backend.Extensions;
+using Microsoft.AspNetCore.Mvc;
 using Newtonsoft.Json.Serialization;
 
 var builder = WebApplication.CreateBuilder(args);
@@ -15,21 +17,31 @@ builder.Services
         options.SerializerSettings.ContractResolver = new DefaultContractResolver
         {
             NamingStrategy = new SnakeCaseNamingStrategy()
-        });
+        })
+    .ConfigureApiBehaviorOptions(options =>
+    {
+        options.InvalidModelStateResponseFactory = actionContext => new BadRequestObjectResult(
+            new ApiError.BadRequest("Bad request", actionContext.ModelState).ToJson()
+        );
+    });
 
 builder.Services
     .AddDbContext<DatabaseContext>()
-    .AddSnowflakeGenerator()
+    .AddCustomServices()
+    .AddCustomMiddleware()
     .AddEndpointsApiExplorer()
     .AddSwaggerGen();
 
 var app = builder.Build();
 
+await app.Initialize(args);
+
 app.UseSerilogRequestLogging();
 app.UseRouting();
 app.UseSwagger();
 app.UseSwaggerUI();
 app.UseCors();
+app.UseCustomMiddleware();
 app.MapControllers();
 
 app.Urls.Clear();
@@ -37,4 +49,4 @@ app.Urls.Add(config.Address);
 
 app.Run();
 
-Log.CloseAndFlush();
+Log.CloseAndFlush();