[#8399] updated CHANGES with notice of breaking Docker changes
diff --git a/CHANGES b/CHANGES
index a241ef8..3cf2136 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,15 @@
+Unreleased
+
+Breaking Changes
+ * [#8399] In an effort to update the Docker startup steps to make them as
+ easy as possible and compatible across as many OS's as possible, the default
+ allura-data location has been moved from `/allura-data` to `./allura-data`.
+ This will likely break existing Docker deployments. To fix your deployment,
+ Either set the LOCAL_SHARED_DATA_ROOT env variable to /allura-data or change
+ the value in the local `.env` file (or move your /allura-data to
+ ./allura-data).
+
+
Version 1.13.0 (May 2021)
This release supports Python 2.7, 3.6, and 3.7.
