Merge pull request #3484 from rommapp/claude/busy-keller-gd2Ue

Fix Docker volume mounts to enable hardlink optimization

Author: gantoine

docker/Dockerfile

@@ -216,8 +216,9 @@ ENV PYTHONDONTWRITEBYTECODE=1
 ENV PYTHONUNBUFFERED=1
 ENV PYTHONPATH=/backend
 
-# Declare the supported volumes
-VOLUME ["/romm/resources", "/romm/library", "/romm/assets", "/romm/config", "/romm/sync", "/redis-data"]
+# Declare only the parent `/romm`, not its subdirs, so Docker keeps them 
+# on one mount (`st_dev`) and cross-directory `os.link()` hardlinks don't fail.
+VOLUME ["/romm", "/redis-data"]
 
 # Expose non-privileged ports
 EXPOSE 8080 6379/tcp