Setting up an observable system for a React/Redux app and a Node.js back end deployed with Docker involves using tools like LogRocket, DataDog, and Honeycomb to monitor and troubleshoot issues effectively. LogRocket integrates with React/Redux to track user behavior and errors, while DataDog aggregates metrics across the DevOps stack, providing insights into deployment and performance issues within Dockerized environments. Honeycomb offers a flexible schema for real-time data analysis and visualization, enhancing the ability to diagnose back-end issues. Together, these tools improve observability, enabling developers to identify and address problems quickly by collecting comprehensive data across the application stack. The integration of these tools supports a proactive approach to maintaining system reliability and performance in complex and distributed environments, highlighting the importance of context and tracing in modern software development.