Improved demo, optimized server.js for Heroku

server.js

@@ -5,7 +5,21 @@ var port = process.env.PORT || 8080;
 var cors_proxy = require("./lib/cors-anywhere");
 cors_proxy.createServer({
     requireHeader: 'x-requested-with',
-    removeHeaders: ['cookie', 'cookie2']
+    removeHeaders: [
+        'cookie',
+        'cookie2',
+        // Strip Heroku-specific headers
+        'x-heroku-queue-wait-time',
+        'x-heroku-queue-depth',
+        'x-heroku-dynos-in-use',
+        'x-request-start'
+    ],
+    httpProxyOptions: {
+        enable: {
+            // Do not add X-Forwarded-For, etc. headers, because Heroku already adds it.
+            xforward: false
+        }
+    }
 }).listen(port, host, function() {
     console.log('Running CORS Anywhere on ' + host + ':' + port);
 });