feat(external-api) Expose deployment info through API

- Set region along shard from xmpp

modules/API/API.js

                     });
                 });
             break;
+        case 'deployment-info':
+            callback(APP.store.getState()['features/base/config'].deploymentInfo);
+            break;
         case 'invite': {
             const { invitees } = request;
 

modules/API/external/external_api.js

         return avatarURL;
     }
 
+    /**
+     * Gets the deployment info.
+     *
+     * @returns {Promise} - Resolves with the deployment info object.
+     */
+    getDeploymentInfo() {
+        return this._transport.sendRequest({
+            name: 'deployment-info'
+        });
+    }
+
     /**
      * Returns the display name of a participant.
      *

resources/prosody-plugins/mod_jiconop.lua

     module:add_identity("server", "shard", shard_name_config);
 end
 
+local region_name_config = module:get_option_string('region_name');
+if region_name_config then
+    module:add_identity("server", "region", region_name_config);
+end
+
 -- this is after xmpp-bind, the moment a client has resource and can be contacted
 module:hook("resource-bind", function (event)
     local session = event.session;