Use fluentd logging for all services in vhr18

docker-compose.vhr18.yml

@@ -167,6 +167,8 @@ services:
     image: registry.gitlab.eox.at/esa/prism/vs/pvs_client:latest
     deploy:
       replicas: 1
+    logging:
+      driver: "fluentd"
 configs:
   init-db:
     file: ./config/vhr18_init-db.sh