updated app catalog with storage path option

templates/romm/docker-compose.yml

@@ -11,6 +11,13 @@
 #   IGDB_CLIENT_SECRET      - IGDB API client secret (optional)
 #   STEAMGRIDDB_API_KEY     - SteamGridDB API key (optional, for cover art)
 #
+# Storage layout:
+#   ROM library    → {{HDD_PATH}}/storage/romm/library     (HDD, host path)
+#   Cover art etc  → {{HDD_PATH}}/storage/romm/resources   (HDD, host path)
+#   App config     → romm_config                            (named volume, NVMe)
+#   MariaDB data   → romm_db_data                           (named volume, NVMe)
+#   Redis data     → romm_redis_data                        (named volume, NVMe)
+#
 # First-time setup:
 #   Default login: admin / admin — change immediately!
 
@@ -53,8 +60,8 @@ services:
       - STEAMGRIDDB_API_KEY=${STEAMGRIDDB_API_KEY:-}
       - TZ=Europe/Budapest
     volumes:
-      - romm_library:/romm/library
-      - romm_resources:/romm/resources
+      - {{HDD_PATH}}/storage/romm/library:/romm/library
+      - {{HDD_PATH}}/storage/romm/resources:/romm/resources
       - romm_config:/romm/config
     networks:
       - traefik-public
@@ -103,8 +110,6 @@ services:
       retries: 3
 
 volumes:
-  romm_library:
-  romm_resources:
   romm_config:
   romm_db_data:
   romm_redis_data: