diff --git a/build-server.js b/build-server.js
index 52e56ff..568c993 100644
--- a/build-server.js
+++ b/build-server.js
@@ -1,5 +1,7 @@
 const nodeStatic = require('node-static');
 const file = new nodeStatic.Server('./build');
+//Heroku uses random port and forwards to port 80 automatically
+//port 3000 is for running locally
 const port = process.env.PORT || 3000;
 console.log('\nListening on port: ' + port);
 require('http').createServer(function(request, response) {