feat: add serverName variable on alert template

Signed-off-by: Christophe Chauvet <christophe.chauvet@gmail.com>

Author: kryskool

server/src/com/mirth/connect/server/alert/Alert.java

@@ -56,6 +56,7 @@ public Map<String, Object> createContext() {
         context.put("alertId", model.getId());
         context.put("alertName", model.getName());
         context.put("serverId", ConfigurationController.getInstance().getServerId());
+        context.put("serverName", ConfigurationController.getInstance().getServerName());
         context.put("date", new DateTool());
 
         return context;