diff --git a/docker-compose.yml b/docker-compose.yml
index 6081d55..750c534 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -71,13 +71,12 @@ services:
     ports:
       - "8080:8080"
     volumes:
-      # Mount the host static directory so scraped content is available outside
-      # the container. Create ./static/books on the host first if needed.
-      - "${STATIC_ROOT:-./static/books}:/app/static/books"
+      - static_books:/app/static/books
     healthcheck:
       test: ["CMD", "wget", "-qO-", "http://localhost:8080/health"]
       interval: 15s
       timeout: 5s
       retries: 3
 
-volumes: {}
+volumes:
+  static_books: