Devops roadmap: add resources links (#7317)

* feat: add a article for nginx as reverse proxy in devops roadmap

* feat: add nginx as load balancer article in devops roadmap

* feat: add a ufw filewall blog for fiirewall resources in devops roadmap

src/data/roadmaps/devops/content/firewall@f3tM2uo6LLSOmyeFfLc7h.md

@@ -6,6 +6,7 @@ Visit the following resources to learn more:
 
 - [@article@What is Firewall?](https://www.checkpoint.com/cyber-hub/network-security/what-is-firewall/)
 - [@article@Types of Firewall](https://www.cisco.com/c/en_in/products/security/firewalls/what-is-a-firewall.html)
+- [@article@Uncomplicated Firewall (UFW)](https://dev.to/coder7475/uncomplicated-firewall-ufw-1638)
 - [@article@Why do we need Firewalls?](https://www.tutorialspoint.com/what-is-a-firewall-and-why-do-you-need-one)
 - [@video@Firewalls and Network Security - SimpliLearn](https://www.youtube.com/watch?v=9GZlVOafYTg)
 - [@feed@Explore top posts about Firewall](https://app.daily.dev/tags/firewall?ref=roadmapsh)

src/data/roadmaps/devops/content/load-balancer@i8Sd9maB_BeFurULrHXNq.md

@@ -6,4 +6,5 @@ Visit the following resources to learn more:
 
 - [@article@What is Load Balancing?](https://www.nginx.com/resources/glossary/load-balancing/)
 - [@article@Load Balancing concepts and algorithms](https://www.cloudflare.com/en-gb/learning/performance/what-is-load-balancing/)
+- [@article@NGINX Reverse Proxy and Load Balancing](https://dzone.com/articles/nginx-reverse-proxy-and-load-balancing)
 - [@video@What is a Load Balancer?](https://www.youtube.com/watch?v=sCR3SAVdyCc)

src/data/roadmaps/devops/content/reverse-proxy@eGF7iyigl57myx2ejpmNC.md

@@ -6,4 +6,5 @@ Visit the following resources to learn more:
 
 - [@article@What is Reverse Proxy?](https://www.cloudflare.com/en-gb/learning/cdn/glossary/reverse-proxy/)
 - [@article@NGINX documentation](https://www.nginx.com/resources/glossary/reverse-proxy-server/)
+- [@article@Understanding NGINX as a Reverse Proxy](https://medium.com/globant/understanding-nginx-as-a-reverse-proxy-564f76e856b2)
 - [@video@Proxy vs Reverse Proxy (Real-world Examples)](https://www.youtube.com/watch?v=4NB0NDtOwIQ)