Automating Container Image Updates with FluxCD (Hands-On Tutorial)

This tutorial explains how FluxCD's Image Automation feature automatically updates container image tags in a Git repository by scanning a container registry, applying an image policy, and committing changes. It walks through the repository structure, application deployment via Kustomization, and the three core resources (ImageRepository, ImagePolicy, ImageUpdateAutomation). A common troubleshooting scenario is covered where a read-only SSH key prevents Flux from pushing commits, resolved by regenerating the Git secret with write access.