Added root path to server for ELB Health Checks

server.js

@@ -130,6 +130,10 @@ var qbo = require("./server/accounting/qbo/qbo");
 app.post("/qbo/authorize", qbo.authorize);
 app.get("/qbo/callback", qbo.callback);
 
+app.get("/", async function (req, res) {
+  res.status(200).send("Access Forbidden.");
+});
+
 if (process.env.NODE_ENV === "production") {
   app.listen(port, (error) => {
     if (error) throw error;