Added error handling middleware that catches all errors. Also added 500.jade template for a user-friendly error template.

app.js

@@ -43,6 +43,11 @@ app.use(function(req, res) {
   res.status(404);
   res.render('404');
 });
+app.use(function(err, req, res, next){
+  console.error(err.stack);
+  res.status(500);
+  res.render('500');
+});
 
 // Development only
 if ('development' === app.get('env')) {

views/500.jade

@@ -0,0 +1,47 @@
+doctype 5
+html
+  head
+    title We're sorry, but something went wrong (500)
+    style.
+      body {
+        background-color: #EFEFEF;
+        color: #2E2F30;
+        text-align: center;
+        font-family: arial, sans-serif;
+      }
+      div.dialog {
+        width: 25em;
+        margin: 4em auto 0 auto;
+        border: 1px solid #CCC;
+        border-right-color: #999;
+        border-left-color: #999;
+        border-bottom-color: #BBB;
+        border-top: #B00100 solid 4px;
+        border-top-left-radius: 9px;
+        border-top-right-radius: 9px;
+        background-color: white;
+        padding: 7px 4em 0 4em;
+      }
+      h1 {
+        font-size: 100%;
+        color: #730E15;
+        line-height: 1.5em;
+      }
+      body > p {
+        width: 33em;
+        margin: 0 auto 1em;
+        padding: 1em 0;
+        background-color: #F7F7F7;
+        border: 1px solid #CCC;
+        border-right-color: #999;
+        border-bottom-color: #999;
+        border-bottom-left-radius: 4px;
+        border-bottom-right-radius: 4px;
+        border-top-color: #DADADA;
+        color: #666;
+        box-shadow:0 3px 8px rgba(50, 50, 50, 0.17);
+      }
+  body
+    .dialog
+      h1 We're sorry, but something went wrong.
+    p If you are the application owner check the logs for more information.