move extension into a seperate file

src/Services/Basket/Basket.API/CustomExtensionMethods.cs

@@ -0,0 +1,37 @@
+namespace Microsoft.eShopOnContainers.Services.Basket.API;
+
+public static class CustomExtensionMethods
+{
+    public static IServiceCollection AddCustomHealthCheck(this IServiceCollection services, IConfiguration configuration)
+    {
+        var hcBuilder = services.AddHealthChecks();
+
+        hcBuilder.AddCheck("self", () => HealthCheckResult.Healthy());
+
+        hcBuilder
+            .AddRedis(
+                configuration["ConnectionString"],
+                name: "redis-check",
+                tags: new string[] { "redis" });
+
+        if (configuration.GetValue<bool>("AzureServiceBusEnabled"))
+        {
+            hcBuilder
+                .AddAzureServiceBusTopic(
+                    configuration["EventBusConnection"],
+                    topicName: "eshop_event_bus",
+                    name: "basket-servicebus-check",
+                    tags: new string[] { "servicebus" });
+        }
+        else
+        {
+            hcBuilder
+                .AddRabbitMQ(
+                    $"amqp://{configuration["EventBusConnection"]}",
+                    name: "basket-rabbitmqbus-check",
+                    tags: new string[] { "rabbitmqbus" });
+        }
+
+        return services;
+    }
+}

src/Services/Basket/Basket.API/Startup.cs

@@ -282,40 +282,4 @@ public class Startup
         eventBus.Subscribe<ProductPriceChangedIntegrationEvent, ProductPriceChangedIntegrationEventHandler>();
         eventBus.Subscribe<OrderStartedIntegrationEvent, OrderStartedIntegrationEventHandler>();
     }
-}
-
-public static class CustomExtensionMethods
-{
-    public static IServiceCollection AddCustomHealthCheck(this IServiceCollection services, IConfiguration configuration)
-    {
-        var hcBuilder = services.AddHealthChecks();
-
-        hcBuilder.AddCheck("self", () => HealthCheckResult.Healthy());
-
-        hcBuilder
-            .AddRedis(
-                configuration["ConnectionString"],
-                name: "redis-check",
-                tags: new string[] { "redis" });
-
-        if (configuration.GetValue<bool>("AzureServiceBusEnabled"))
-        {
-            hcBuilder
-                .AddAzureServiceBusTopic(
-                    configuration["EventBusConnection"],
-                    topicName: "eshop_event_bus",
-                    name: "basket-servicebus-check",
-                    tags: new string[] { "servicebus" });
-        }
-        else
-        {
-            hcBuilder
-                .AddRabbitMQ(
-                    $"amqp://{configuration["EventBusConnection"]}",
-                    name: "basket-rabbitmqbus-check",
-                    tags: new string[] { "rabbitmqbus" });
-        }
-
-        return services;
-    }
 }