bugfix ereuse pilot: postgres was not persistent

docker-compose__pilot-ereuse.yml

@@ -101,13 +101,14 @@ services:
       - POSTGRES_PASSWORD=${DEVICEHUB_DB_PASSWORD}
       - POSTGRES_USER=${DEVICEHUB_DB_USER}
       - POSTGRES_DB=${DEVICEHUB_DB_DATABASE}
+    volumes:
+      - pg_data:/var/lib/postgresql/data
     # DEBUG
     #ports:
     #  - 5432:5432
     # TODO persistence
-    #volumes:
-    #  - pg_data:/var/lib/postgresql/data
 
 volumes:
   sharedsecret:
   devicehub:
+  pg_data: