Log more info for internal errors in debug mode

backend/app.js

@@ -75,7 +75,7 @@ app.use(function (err, req, res, next) {
 
 	// Not every error is worth logging - but this is good for now until it gets annoying.
 	if (typeof err.stack !== 'undefined' && err.stack) {
-		if (process.env.NODE_ENV === 'development') {
+		if (process.env.NODE_ENV === 'development' || process.env.DEBUG) {
 			log.debug(err.stack);
 		} else if (typeof err.public == 'undefined' || !err.public) {
 			log.warn(err.message);