aspnet-core

In the "Set the environment" section, the doc refers to setting the value of env variables w/o showing how to do it.
But the goal can be achieved that way. I suggest you add this code snippet:

protected override IHostBuilder CreateHostBuilder() =>
        base.CreateHostBuilder().ConfigureWebHost(x => x.UseEnvironment("integration"));

The derived WebApplicationFactory will therefor

I know it's not a course about RESTful principles but maybe you'll consider in the future extracting resource id from request body to path parameter ?

https://github.com/aspnetrun/run-aspnetcore-microservices/blob/c30712aa099bc335f5613a3b196ea1e943f800a5/src/Services/Catalog/Catalog.API/Controllers/CatalogController.cs#L85

Replace client-side caching...
[ResponseCache(Duration = 14400, Location = ResponseCacheLocation.Any)]

...with serverside caching
private readonly IMemoryCache memoryCache;

• Caching on the home page should be broken when we add a new post or comment (includes status updates and deletes).
• Caching on the archive page should be broken when we add a new post.
• Caching on the categor