Added reference to plugin settings config docs

[noissue]

pulp-in-one-container.md

@@ -23,9 +23,16 @@ $ mkdir settings pulp_storage pgsql containers
 $ echo "CONTENT_ORIGIN='http://$(hostname):8080'
 ANSIBLE_API_HOSTNAME='http://$(hostname):8080'
 ANSIBLE_CONTENT_HOSTNAME='http://$(hostname):8080/pulp/content'
+TOKEN_SERVER = "http://(hostname):8080/token/"
+TOKEN_SIGNATURE_ALGORITHM = 'ES256'
+PUBLIC_KEY_PATH = '/tmp/public_key.pem'
+PRIVATE_KEY_PATH = '/tmp/private_key.pem'
 CACHE_ENABLED=True" >> settings/settings.py
 ```
 
+Refer to plugin settings configuration docs for more before spunning the container.
+For example, [pulp_container plugin](https://docs.pulpproject.org/pulp_container/authentication.html#token-authentication-label) requires key pair generation.
+
 ## With SELinux
 
 For systems with SELinux in enforcing mode, use the following command to start Pulp: