Add OpenAPI services to Program.Main.cs

Author: sander1095

src/ProjectTemplates/Web.ProjectTemplates/content/WebApiAot-CSharp/Program.Main.cs

@@ -15,8 +15,20 @@ public static void Main(string[] args)
             options.SerializerOptions.TypeInfoResolverChain.Insert(0, AppJsonSerializerContext.Default);
         });
 
+#if (EnableOpenAPI)
+        // Learn more about configuring OpenAPI at https://aka.ms/aspnet/openapi
+        builder.Services.AddOpenApi();
+#endif
+
         var app = builder.Build();
 
+#if (EnableOpenAPI)
+        if (app.Environment.IsDevelopment())
+        {
+            app.MapOpenApi();
+        }
+#endif
+
         var sampleTodos = new Todo[] {
             new(1, "Walk the dog"),
             new(2, "Do the dishes", DateOnly.FromDateTime(DateTime.Now)),