tidy up stuff

root/etc/cont-init.d/30-config

@@ -1,10 +1,11 @@
 #!/usr/bin/with-contenv bash
 
-# put database in /config
+# copy database to /config if not exists
 [[ ! -e /config/app.db ]] && \
 	cp /defaults/app.db /config/app.db \
 
-# link to /app/calibre-web/app.db
+# create symlink for database
+[[ ! -L /app/calibre-web/app.db ]] && \
 	ln -s /config/app.db /app/calibre-web/app.db
 
 # permissions

root/etc/services.d/calibre-web/run

@@ -4,4 +4,3 @@ cd /app/calibre-web || exit
 
 exec \
 	s6-setuidgid abc python /app/calibre-web/cps.py
-