allow 1.2 times RAM

This is basically to allow 2 phabricators and another small app with
no warning on a 4gb droplet :-)

src/constants.js

@@ -9,6 +9,6 @@ exports = module.exports = {
     ADMIN_CLIENT_ID: 'webadmin', // oauth client id
     ADMIN_APPID: 'admin', // admin appid (settingsdb)
 
-    DEFAULT_MEMORY_LIMIT: (256 * 1024 * 1024)
+    DEFAULT_MEMORY_LIMIT: (256 * 1024 * 1024) // see also client.js
 };