Added README

README.md

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+# Image Cleanup
+
+This repository manages a simple maintenance utility used to keep the server's Docker environment clean. It prevents disk space exhaustion by removing unused data.
+
+## 🛠️ Functionality
+
+The service executes a deep cleanup of the Docker system using the following command:
+
+```bash
+docker system prune -af --volumes
+```
+
+This command removes:
+- All stopped containers.
+- All networks not used by at least one container.
+- All images without at least one container associated with them.
+- All build cache.
+- All unused volumes.
+
+## 📅 Automation Schedule
+
+The cleanup is managed by Woodpecker CI and is triggered in two ways:
+- Weekly Cron: A scheduled task that runs once a week to ensure the host doesn't accumulate "cruft" over time.
+- Manual Push: Any push to the main branch will trigger an immediate cleanup, allowing for on-demand maintenance.
+
+## 📂 Repository Structure
+
+.woodpecker.yaml: Defines the cleanup logic and the triggers (cron and push events).
+
+## ⚠️ Important Note
+
+Since this service uses the -a (all) and --volumes flags, it is very thorough. Ensure that any data you wish to persist is explicitly mapped to a persistent volume or handled by a running container, as unreferenced volumes will be purged.