Configure audiobookshelf to use NFS volumes

Switch from local bind mounts to NFS volumes on 192.168.1.192:
- config: /mnt/user/media/audiobooks/config
- metadata: /mnt/user/media/audiobooks/metadata
- library: /mnt/user/media/audiobooks/library
- untagged: /mnt/user/media/audiobooks/untagged

Follows the same NFS pattern used by calibre for media storage.

audiobookshelf/docker-compose.yaml

@@ -3,6 +3,32 @@ networks:
     external:
       name: npm-network
 
+volumes:
+  config:
+    driver: local
+    driver_opts:
+      type: nfs
+      o: "addr=192.168.1.192,rw,nolock,soft"
+      device: ":/mnt/user/media/audiobooks/config"
+  metadata:
+    driver: local
+    driver_opts:
+      type: nfs
+      o: "addr=192.168.1.192,rw,nolock,soft"
+      device: ":/mnt/user/media/audiobooks/metadata"
+  library:
+    driver: local
+    driver_opts:
+      type: nfs
+      o: "addr=192.168.1.192,rw,nolock,soft"
+      device: ":/mnt/user/media/audiobooks/library"
+  untagged:
+    driver: local
+    driver_opts:
+      type: nfs
+      o: "addr=192.168.1.192,rw,nolock,soft"
+      device: ":/mnt/user/media/audiobooks/untagged"
+
 services:
   audiobookshelf:
     image: ghcr.io/advplyr/audiobookshelf:latest
@@ -15,10 +41,10 @@ services:
       - VIRTUAL_PORT=80
       - LETSENCRYPT_HOST=audiobookshelf.kolpacksoftware.com
     volumes:
-      - /srv/audiobookshelf/config:/config
+      - config:/config
-      - /srv/audiobookshelf/metadata:/metadata
+      - metadata:/metadata
-      - /mnt/media/audiobooks/library:/audiobooks
+      - library:/audiobooks
-      - /mnt/media/audiobooks/untagged:/untagged
+      - untagged:/untagged
     ports:
       - 13378:80
     restart: unless-stopped