feat(server): Dockerfile and compose for the Lidarr stack

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

server/docker-compose.yml

@@ -0,0 +1,25 @@
+services:
+  musicfetch-api:
+    build:
+      context: ..
+      dockerfile: server/Dockerfile
+    container_name: musicfetch-api
+    restart: unless-stopped
+    ports:
+      - "6769:6769"
+    environment:
+      LIDARR_URL: "http://lidarr:8686"
+      LIDARR_API_KEY: "${LIDARR_API_KEY}"
+      MUSICFETCH_API_KEY: "${MUSICFETCH_API_KEY}"
+      MUSICFETCH_ROOT: "/media/music"
+      MUSICFETCH_PORT: "6769"
+    volumes:
+      - /media/music:/media/music
+    networks:
+      - lidarr_net
+
+networks:
+  lidarr_net:
+    external: true
+    # Set to the actual network name of your existing Lidarr stack, e.g.:
+    # name: media_default