Blocking someone removes notifications between you

Also note in the CI guide that the build caches need disk space where
Docker keeps its data.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs/ANDROID-CI.md

@@ -22,6 +22,9 @@ The pieces:
 
 The server needs about 8 GB of free memory during a build and about 15 GB of disk for the image and
 caches. A first build takes 30-40 minutes; later ones reuse the Gradle cache.
+The caches are Docker volumes, which live wherever Docker keeps its data (usually `/var/lib/docker`).
+Check that disk has room (`df -h /var/lib/docker`): if it fills up, everything else using Docker on the
+server, including databases, stops writing.
 
 1. **Turn on Actions** if it's off. In Gitea's `app.ini`, set:
    ```ini