chore: sync content to repo (#9522)

Co-authored-by: kamranahmedse <4921183+kamranahmedse@users.noreply.github.com>

src/data/roadmaps/backend/content/cap-theorem@LAdKDJ4LcMaDWqslMvE8X.md

@@ -6,5 +6,6 @@ Visit the following resources to learn more:
 
 - [@article@What is CAP Theorem?](https://www.bmc.com/blogs/cap-theorem/)
 - [@article@An Illustrated Proof of the CAP Theorem](https://mwhittaker.github.io/blog/an_illustrated_proof_of_the_cap_theorem/)
+- [@article@Perspectives on the CAP Theorem](https://github.com/user-attachments/files/18232157/Brewer2.pdf)
 - [@article@CAP Theorem and its applications in NoSQL Databases](https://www.ibm.com/uk-en/cloud/learn/cap-theorem)
 - [@video@What is CAP Theorem?](https://www.youtube.com/watch?v=_RbsFXWRZ10)

src/data/roadmaps/backend/content/introduction@SiYUdtYMDImRPmV2_XPkH.md

@@ -0,0 +1,10 @@
+# Backend Development
+
+Backend development focuses on the server-side logic of a web application, handling data storage, processing, and security. It involves building and maintaining the infrastructure that powers the user-facing frontend, ensuring seamless communication between the client and the database. This includes tasks like creating APIs, managing databases, and implementing authentication and authorization mechanisms.
+
+Visit the following resources to learn more:
+
+- [@article@What is backend? A comprehensive intro to server-side development](https://alokai.com/blog/what-is-backend)
+- [@article@What is Back-End Architecture?](https://www.codecademy.com/article/what-is-back-end-architecture)
+- [@video@Backend web development - a complete overview](https://www.youtube.com/watch?v=XBu54nfzxAQ)
+- [@video@How The Backend Works](https://www.youtube.com/watch?v=4r6WdaY3SOA)