feat: Add network mode configuration for Docker in .env and docker-compose

docker-compose.yaml

@@ -8,6 +8,11 @@
 #
 # Access the web interface at http://localhost:8808
 #
+# Network modes:
+#   - Set ABOGEN_NETWORK_MODE=host in .env to use host networking
+#     (required for accessing LAN resources like Calibre OPDS)
+#   - Leave unset or use "bridge" for isolated container networking
+#
 services:
   abogen:
     build:
@@ -19,6 +24,7 @@ services:
         USE_GPU: ${USE_GPU:-true}
     image: abogen:latest
     user: "${ABOGEN_UID:-1000}:${ABOGEN_GID:-1000}"
+    network_mode: ${ABOGEN_NETWORK_MODE:-bridge}
     ports:
       - "${ABOGEN_PORT:-8808}:8808"
     volumes: