update loki docs

ansible/docs/loki.md

@@ -4,7 +4,10 @@ To deploy Loki-stack, set <code>install_loki_task: true</code>.
 
 ## Storage
 
-In OpenStack UI, navigate to **Object Storage > Containers** and create a new container.
+Run the following command to create a new container:
+```
+openstack container create <container-name>
+```
 
 Run the following commands to create EC2 credentials for accessing the S3 storage:
 ```