Reverse proxy: Link to cloud provider best practices

Thanks again to u/idle_pumkin: https://www.reddit.com/r/cybersecurity/comments/1c1bhki/comment/kz7w8s4/

src/content/docs/tactics/reverse-proxies.md

@@ -110,11 +110,11 @@ cloud-based proxies are the most effective at mitigating DDoS attacks.
 The following are the most popular providers of internet/transport and application layer proxies:
 
 - [Akamai](https://www.akamai.com/).
-- AWS: [API Gateway](https://aws.amazon.com/api-gateway/), [CloudFront](https://aws.amazon.com/cloudfront/) (HTTP proxy), and [Elastic Load Balancing](https://aws.amazon.com/elasticloadbalancing/).
-- [Azure Load Balancer](https://azure.microsoft.com/solutions/load-balancing-with-azure/).
+- AWS: [API Gateway](https://aws.amazon.com/api-gateway/), [CloudFront](https://aws.amazon.com/cloudfront/) (HTTP proxy), and [Elastic Load Balancing](https://aws.amazon.com/elasticloadbalancing/). See also their best practices for [DDoS mitigation](https://docs.aws.amazon.com/whitepapers/latest/aws-best-practices-ddos-resiliency/best-practices-for-ddos-mitigation.html) and [load balancing](https://aws.github.io/aws-elb-best-practices/security/infrastructure_protection/).
+- [Azure Load Balancer](https://azure.microsoft.com/solutions/load-balancing-with-azure/). See also [Azure DDoS Protection documentation](https://learn.microsoft.com/en-us/azure/ddos-protection/).
 - [Cloudflare](https://www.cloudflare.com/).
 - [Fastly](https://www.fastly.com/).
-- [Google Cloud Load Balancing](https://cloud.google.com/load-balancing/).
+- [Google Cloud Load Balancing](https://cloud.google.com/load-balancing/). See also [Google Cloud Armor](https://cloud.google.com/security/products/armor), and [its best practices](https://cloud.google.com/armor/docs/best-practices).
 - [Incapsula](https://www.incapsula.com/).
 - [Netscout Arbor](https://www.netscout.com/arbor).