Update system-design-script.md

Author: shajibsikder

docs/system-design-script.md

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+Weekmotion is a modular monolithic backend system designed for scalable video content delivery and creator monetization.
 
+Built with Laravel, the system follows a clean separation of responsibilities where the core API handles user requests, while heavy operations such as rewards processing, analytics, and background jobs are delegated to Redis-based queues and worker processes.
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+For performance, MySQL is used as the primary relational database with proper indexing and transactional consistency, especially for financial operations like deposits, withdrawals, and internal ledger updates.
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+The architecture is optimized using Nginx as a reverse proxy, Redis for caching high-frequency data, and a queue-driven processing model to ensure non-blocking request handling.
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+Overall, the system is designed for scalability, data integrity, and maintainability under high traffic workloads, while maintaining a modular monolith structure instead of a distributed microservices architecture.