models and doc update

doc/server/server_deployment.puml

@@ -0,0 +1,36 @@
+@startuml
+
+cloud Network
+component lb as "Load Balancer"
+component http1 as "HTTP Server"
+component http2 as "HTTP Server"
+component ws1 as "Websocket Server"
+component ws2 as "Websocket Server"
+component ws3 as "Websocket Server"
+component ws4 as "..."
+database q as "Message Queue"
+component d1 as "Message Dispatcher"
+component d2 as "Message Dispatcher"
+component d3 as "Message Dispatcher"
+component d4 as "Message Dispatcher"
+component d5 as "..."
+
+lb -- http1
+lb -- http2
+lb -- ws1
+lb -- ws2
+lb -- ws3
+lb -- ws4
+http1 -- q 
+http2 -- q
+ws1 -- q
+ws2 -- q
+ws3 -- q
+q -- d1
+q -- d2
+q -- d3
+q -- d4
+q -- d5
+Network -- lb
+
+@enduml