diff --git a/README.md b/README.md
index c507e2a..9ae0591 100644
--- a/README.md
+++ b/README.md
@@ -297,6 +297,19 @@ management technology, and is beyond the scope of this documentation.
 
 ## Container Configuration
 
+* `ATL_FORCE_CFG_UPDATE` (default: false)
+
+   The Docker [entrypoint](entrypoint.py) generates application configuration on
+   first start; not all of these files are regenerated on subsequent
+   starts. This is deliberate, to avoid race conditions or overwriting manual
+   changes during restarts and upgrades. However in deployments where
+   configuration is purely specified through the environment (e.g. Kubernetes)
+   this is undesirable; this flag forces an update of all generated files.
+   
+   In Confluence the affected files are:
+
+   * `confluence.cfg.xml`
+   
 * `SET_PERMISSIONS` (default: true)
 
    Define whether to set home directory permissions on startup. Set to `false` to disable