update example and document feature for httpStatic options

packages/node_modules/node-red/settings.js

@@ -223,10 +223,15 @@ module.exports = {
      * to move httpAdminRoot
      */
     //httpStatic: '/home/nol/node-red-static/', //single static source
-    /* OR multiple static sources can be created using an array of objects... */
+    /**
+     *  OR multiple static sources can be created using an array of objects...
+     *  Each object can also contain an options object for further configuration.
+     *  See https://expressjs.com/en/api.html#express.static for available options.
+     */
     //httpStatic: [
     //    {path: '/home/nol/pics/',    root: "/img/"},
     //    {path: '/home/nol/reports/', root: "/doc/"},
+    //    {path: '/home/nol/videos/',  root: "/vid/", options: {maxAge: '1d'}}
     //],
 
     /**
@@ -431,7 +436,7 @@ module.exports = {
                 enabled: true
             }
         },
-        
+
     },
 
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