diff --git a/backend/app.py b/backend/app.py
index 95d8214..3cae4c2 100644
--- a/backend/app.py
+++ b/backend/app.py
@@ -1,3 +1,4 @@
+# app.py - main backend program
 # All code in this file is licensed under the ISC license, provided in LICENSE.txt
 from flask import Flask, redirect, url_for, request
 import flask