update docs

Author: niqdev

docs/cloud.md

@@ -21,6 +21,7 @@
 * [Kubernetes Best Practices 101](https://github.com/diegolnasc/kubernetes-best-practices)
 * [Kubernetes Failure Stories](https://k8s.af)
 * [10 most common mistakes using kubernetes](https://blog.pipetail.io/posts/2020-05-04-most-common-mistakes-k8s)
+* [Container Training](https://container.training)
 
 ### Tools
 

docs/operating-system.md

@@ -23,6 +23,7 @@
 * [Learning operating system development using Linux kernel and Raspberry Pi](https://s-matyukevich.github.io/raspberry-pi-os) (incomplete)
 * [Writing a "bare metal" operating system for Raspberry Pi 4](https://www.rpi4os.com)
 * [Writing a simple 16 bit VM in less than 125 lines of C](https://www.andreinc.net/2021/12/01/writing-a-simple-vm-in-less-than-125-lines-of-c)
+* [os-tutorial: How to create an OS from scratch](https://github.com/cfenollosa/os-tutorial)
 
 ## Kernel
 

docs/system-design.md

@@ -34,6 +34,7 @@
 * [Implementing Raft for Browsers with Rust and WebRTC](https://eevans.co/blog/wraft)
 * [HTTP Feeds](https://www.http-feeds.org)
 * [Autopilot Pattern Applications](http://autopilotpattern.io)
+* [REST Hooks](https://resthooks.org)
 
 ## Blogs