diff --git a/README.md b/README.md
index b496c5a..c6b3f11 100644
--- a/README.md
+++ b/README.md
@@ -66,6 +66,15 @@ See the [hardware guide](hardware.md) to know exactly what to buy.
 
 See the [installation instructions](installation.md) to get started.
 
+## CI/CD
+
+The GitHub Action workflow caches the Raspberry Pi image to save build time. The workflow uses several optimizations to avoid "No space left on device" errors:
+
+1. Uses the Raspberry Pi OS Lite image (smaller than the full image)
+2. Optimizes disk space usage with `bind_mount_repository: "yes"` parameter
+3. Removes unnecessary packages and cleans up disk space throughout the build
+4. Reduces the additional image space to 4GB (down from 6GB)
+
 ## History
 
 [Learn about Go Note Go's predecessor "Shh Shell" here.](https://davidbieber.com/projects/shh-shell/)