ImageKit Client Hints

Startup.cs

var imageCdnUrl = Configuration["CDN:Images:CdnUrl"];
app.Use(async (context, next) =>
{
    context.Response.Headers.Add("Accept-CH", "viewport-width, width, dpr");
    context.Response.Headers.Add("Feature-Policy", $"ch-viewport-width {imageCdnUrl};ch-width {imageCdnUrl};ch-dpr {imageCdnUrl};ch-device-memory {imageCdnUrl};ch-rtt {imageCdnUrl};ch-ect {imageCdnUrl};ch-downlink {imageCdnUrl}");
    context.Response.Headers.Add("Permissions-Policy", $"ch-viewport-width {imageCdnUrl};ch-width {imageCdnUrl};ch-dpr {imageCdnUrl};ch-device-memory {imageCdnUrl};ch-rtt {imageCdnUrl};ch-ect {imageCdnUrl};ch-downlink {imageCdnUrl}");
    await next();
});