Add CLI helper for entropy volume

docs/index.md

@@ -30,6 +30,10 @@ covers both workloads).
 - [[Deployment Flow]] — git-based deploy, target map, health checks
 - [[Testing Policy]] — the test seams and how to run them
 
+## Dankserver Storage
+
+- [[Entropy Volume]] — command-line unlock and mount helper
+
 ## Dankserver Services
 
 - [[RomM]] — retro game manager