Add caching resources for backend performance best practices

Adds high-quality external learning resources for caching strategies, cache invalidation, and caching utilization topics in backend performance best practices.

src/data/best-practices/backend-performance/content/cache-invalidation.md

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 # Efficient Cache-Invalidation Strategies
 
-In the realm of backend performance, adopting proper cache-invalidation strategies is highly relevant. Effective cache management takes the pressure off web servers by saving and displaying previously retrieved or computed data. However, the challenge arises when such cached data becomes outdated, or 'stale'. If not addressed, users may be presented incorrect or obsolete information. Good cache-invalidation strategies ensure that the system constantly refreshes or dumps outdated cache, keeping the data consistent and accurate. For example, using time-based strategies, a system could invalidate cache after a set period, essentially creating a self-maintenance regimen. Similarly, with a write-through approach, an application updates the cache immediately as changes are made, guaranteeing the users always receive the most recent data.
+In the realm of backend performance, adopting proper cache-invalidation strategies is highly relevant. Effective cache management takes the pressure off web servers by saving and displaying previously retrieved or computed data. However, the challenge arises when such cached data becomes outdated, or 'stale'. If not addressed, users may be presented incorrect or obsolete information. Good cache-invalidation strategies ensure that the system constantly refreshes or dumps outdated cache, keeping the data consistent and accurate. For example, using time-based strategies, a system could invalidate cache after a set period, essentially creating a self-maintenance regimen. Similarly, with a write-through approach, an application updates the cache immediately as changes are made, guaranteeing the users always receive the most recent data.
+
+Visit the following resources to learn more:
+
+- [@official@Cache Invalidation - Redis](https://redis.io/glossary/cache-invalidation/)
+- [@official@Cache invalidation overview - Google Cloud](https://cloud.google.com/cdn/docs/cache-invalidation-overview)

src/data/best-practices/backend-performance/content/caching-strategies.md

@@ -1,3 +1,9 @@
 # Application of Suitable Caching Patterns
 
-For optimal backend performance in web applications, implementing the correct caching approach, such as cache aside, write-through, or read-through caching, matters greatly. This is significant fundamentally because it reduces the load on your database, fetching data quicker and decreasing the latency time, leading to faster response times. For instance, consider a high-traffic e-commerce site where hundreds of thousands of product details need to be fetched simultaneously. If a suitable caching pattern like the read-through cache is applied here, it would handle retrieving data from the database when the cache is empty, ensuring that the application always receives data, improving the overall performance and user experience.
+For optimal backend performance in web applications, implementing the correct caching approach, such as cache aside, write-through, or read-through caching, matters greatly. This is significant fundamentally because it reduces the load on your database, fetching data quicker and decreasing the latency time, leading to faster response times. For instance, consider a high-traffic e-commerce site where hundreds of thousands of product details need to be fetched simultaneously. If a suitable caching pattern like the read-through cache is applied here, it would handle retrieving data from the database when the cache is empty, ensuring that the application always receives data, improving the overall performance and user experience.
+
+Visit the following resources to learn more:
+
+- [@article@Introduction to Database Caching - Prisma](https://www.prisma.io/dataguide/managing-databases/introduction-database-caching)
+- [@article@Popular Caching Strategies - LinkedIn](https://www.linkedin.com/pulse/three-popular-caching-strategies-donny-widjaja-mspm-cspo/)
+- [@article@Caching Strategies - Medium](https://medium.com/@mmoshikoo/cache-strategies-996e91c80303)

src/data/best-practices/backend-performance/content/utilize-caching.md

@@ -1,3 +1,10 @@
 # Utilizing Caching Mechanisms 
 
-Backend performance of web applications can see substantial improvements when effective caching mechanisms, like HTTP, server/client, and CDN are properly implemented. Caching can significantly decrease the load on the server, minimising the effort necessary to generate a response to a user's request. For example, when a user revisits a previously accessed web page, caching mechanisms retrieve stored information more swiftly than the server could generate it. This process effectively cuts down on latency, bandwidth usage and processing power, speeding up the loading times and contributing to smoother user experience. CDN-based caches also help in serving static resources to users from the nearest possible location, reducing network latency.
+Backend performance of web applications can see substantial improvements when effective caching mechanisms, like HTTP, server/client, and CDN are properly implemented. Caching can significantly decrease the load on the server, minimising the effort necessary to generate a response to a user's request. For example, when a user revisits a previously accessed web page, caching mechanisms retrieve stored information more swiftly than the server could generate it. This process effectively cuts down on latency, bandwidth usage and processing power, speeding up the loading times and contributing to smoother user experience. CDN-based caches also help in serving static resources to users from the nearest possible location, reducing network latency.
+
+Visit the following resources to learn more:
+
+- [@article@What is Caching - AWS](https://aws.amazon.com/caching/)
+- [@article@Caching - Cloudflare](https://www.cloudflare.com/learning/cdn/what-is-caching/)
+- [@article@Caching - System Design Concept - GeeksforGeeks](https://www.geeksforgeeks.org/system-design/caching-system-design-concept-for-beginners/)
+- [@video@Getting Started with Caching - Youtube](https://www.youtube.com/watch?v=tCEzxbuOjLs)