[DOCCUMENT] - UI - Multiple management server support

ui/docs/multiple-management-server.md

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+# Multiple Management Server
+Use file `public/config.json` (or `dist/config.json` after build) to configure the settings which allow Cloudstack to support multiple servers.
+
+## Setting `config.json`
+```
+"servers": [
+    {
+      "name": "server01",
+      "apiHost": "/server01",
+      "apiBase": "/client/api"
+    },
+    {
+      "name": "server02",
+      "apiHost": "",
+      "apiBase": "/client/api"
+    }
+  ],
+"multipleServer": true
+```
+- `multipleServer` configure to allow Cloudstack to support multiple servers.
+- `servers` list of servers to which Cloudstack can connect.
+
+## Nginx config
+Example: Use following settings in `config.json` so that user's GUI can work with different servers (to be put into /etc/nginx/conf.d/default/conf or similar):
+
+```
+server {
+    listen          80;
+    server_name     localhost;
+
+    location / {
+        # /src/ui/dist contains the built UI webpack
+        root        /src/ui/dist;
+        index       index.html;
+    }
+
+    # for apiHost of server01 located in config.json
+    location /server01/client/ {
+        rewrite ^/server01/(.*)$ /$1 break;
+        # server's actual URI
+        proxy_pass   https://server01.your.domain;
+    }
+
+    # for apiHost of server02 located in config.json
+    location /client/ {
+        # server's actual URI
+        proxy_pass   https://server02.your.domain;
+    }
+}
+```