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Openai/694ab010-3e7c-8000-b0e8-b98c22b7a063
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=== You split Streamlit and FastAPI not because AWS is complicated, but because security, cost, and reliability fundamentally break when UI and backend share secrets, scaling, and traffic patterns. API Gateway is designed for APIs, ALB is designed for websites, Secrets Manager belongs only in backend containers, WAF blocks garbage traffic before it costs you money, and CORS ensures only your UI can use your API from browsers. Your old single-container setup was correct for learning—but this split is what turns it into a real, production-grade system. === If you want, next I can: * Draw a one-page architecture diagram * Show exact WAF rules to enable * Show cost comparison: single container vs split * Explain when it is OK to keep one container
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