Prevent using seq if no seq host is set

src/Vegasco.Server.Api/Common/DependencyInjectionExtensions.cs

@@ -30,8 +30,12 @@ public static class DependencyInjectionExtensions
 	}
 
 	private static IHostApplicationBuilder AddBuilderServices(this IHostApplicationBuilder builder)
+	{
+		string? seqHost = builder.Configuration.GetConnectionString("seq");
+		if (!string.IsNullOrEmpty(seqHost))
 		{
 			builder.AddSeqEndpoint("seq");
+		}
 
 		return builder;
 	}