deployment: add volume for ulocollectweb meta data

deployment/docker-compose.yml

@@ -13,8 +13,12 @@ services:
 
         ulocollectweb:
                 image: "schaertl/ulocollectweb"
+                environment:
+                        - ULOCOLLECTWEB_DB_FILE=/var/lib/ulocollectweb/ulo.bbolt
                 ports:
                         - ${ULOCOMPOSE_COLLECTPORT}:7300
+                volumes:
+                        - collectweb-volume:/var/lib/ulocollectweb
 
         uloapps:
                 image: "schaertl/uloapps:latest"
@@ -26,3 +30,4 @@ services:
 
 volumes:
         graphdb-volume:
+        collectweb-volume: