Managing Docker containers manually is time-consuming and prone to errors. This guide details how to automate container updates using two powerful tools: Watchtower and Diun. Watchtower acts as an automatic updater, pulling new images and restarting containers, while Diun serves as a notification system, alerting you to available updates before they are applied.

The article provides step-by-step instructions for setting up each tool via Docker Compose, covering configuration for email and Telegram notifications, selective container updates using labels, and scheduling. It also explores a hybrid strategy for managing mixed environments, where Diun monitors all containers and Watchtower automatically updates only development instances, ensuring production stability. By implementing this automation, developers can save significant time, reduce security risks, and maintain a robust container infrastructure.