.NET Core Applications - Startup - Static Files Middleware and Response Caching

Startup.cs

public class Startup
{
    // Some other code...
    
    public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
    {
        // some middlewares...
        
        // Files from default wwwroot folder, no specific response header added.
        app.UseStaticFiles();

        // For images under {content-root}/Images folder
        // Responses would be cached for 7 days
        const string cacheMaxAge = "604800";
        string imagesFolderPath = Path.Combine(env.ContentRootPath, "Images");
        
        app.UseStaticFiles(new StaticFileOptions
        {

            FileProvider = new PhysicalFileProvider(imagesFolderPath),
            RequestPath = "/images",
            OnPrepareResponse = ctx =>
            {
                // using Microsoft.AspNetCore.Http;
                ctx.Context.Response.Headers.Append("Cache-Control", $"public, max-age={cacheMaxAge}");
            }
        });
      
        // some other middlewares...
    }
}