Add information to the README file.

README.md

@@ -9,12 +9,33 @@ Role Variables
 The most important variables are listed below:
 
 ``` yaml
+docker_swarm_cluster_haproxy_install: True
+# mesh, keepalive, global
+docker_swarm_haproxy_installation_type: 'keepalive'
+docker_swarm_haproxy_networks:
+  - '{{ docker_swarm_portainer_network }}'
+#
+docker_swarm_expose_api_via_haproxy: True
+docker_swarm_expose_api_hostname: 'swarm.example.com'
+# Portainer
+docker_swarm_cluster_portainer_install: True
+docker_swarm_portainer_hostname: 'portainer-swarm.example.com'
+docker_swarm_portainer_additional_constraints: []
+#  - 'node.hostname != docker01'
+
+docker_swarm_portainer_network: 'agent_network'
+docker_swarm_portainer_http_port: '9000'
+docker_swarm_portainer_service_port: '8000'
+
+docker_swarm_haproxy_additional_services: []
+#  - { acl_name: 'service', acl_rule: 'hdr_dom(host) -i service.example.com', service_name: 'service-', service_replica_num: '1', service_port: '9999', service_overlay_network: 'service-network' }
 ```
 
 Dependencies
 ------------
 
-docker
+* docker
+* keepalived, when haproxy is installed in HA host mode
 
 License
 -------