Update main.js

main.js

@@ -40,6 +40,9 @@ const utils =    require(__dirname + '/lib/utils'); // Get common adapter utils
 var express    = require('express');        // call express
 var request    = null; // will be initialized later if polling enabled
 
+var LE         = require(utils.controllerDir + '/lib/letsencrypt.js');
+
+
 // REST server
 var webServer  = null;
 var app        = null;