You can clone with
nodejs is slow for https.
It's advised to use a dedicated ssl termination like studhttps://groups.google.com/d/msg/nodejs/PJSs3R25B_Q/zJ4wGF89pZEJ
We can also take a look at tlsnappy
Moreover, nodejs API doesn't alliow multiple certificates per server :/http://nodejs.org/api/all.html#all_tls_createserver_options_secureconnectionlistener
It make it difficult to implement such features : https://devcenter.heroku.com/articles/ssl-endpoint
BTW, we are not alone with this kind of problem : https://groups.google.com/a/cloudfoundry.org/forum/?fromgroups=#!topic/vcap-dev/4Xdrfktepy8