fix: relocate LiteFS mount to /litefs and use /data for persistent artwork

Dockerfile

@@ -18,6 +18,9 @@ RUN chmod +x /usr/local/bin/entrypoint.sh
 # Copy LiteFS configuration
 COPY litefs.yml /etc/litefs.yml
 
+# Create mount points and data directories
+RUN mkdir -p /litefs /data
+
 # LiteFS becomes the supervisor.
 
 # It will mount the FUSE fs and then execute the command defined in litefs.yml's exec section.