Do not make the ingest folder

A folder that Bindery made hid a missing volume mount. The books went
to a folder inside the container, and CWA never saw them. A missing
folder is now an error in the log at the start, and each upload fails
with a message that names the mount.

docker-compose.yml

@@ -34,7 +34,7 @@ services:
       start_period: 30s
       retries: 3
     volumes:
-      # CWA's ingest folder. New stories and updates go here.
+      # CWA's ingest folder. New stories and updates go here. Bindery does not make the folder.
       - /path/to/cwa/ingest:/cwa-book-ingest
       # The story database and personal.ini. Create the folder before the first start.
       - ./config:/config