I really like this idea (and maybe I'm just dumb) but I really didn't get from the homepage that this was for actual deployed applications, not just a collabora

I really like this idea (and maybe I'm just dumb) but I really didn't get from the homepage that this was for actual deployed applications, not just a collaborative web dev environment. In particular, I really need to know what backend services (if any) are available. Almost everything I write uses at least Postgres and Memcached, are those available? Even just a list of addons/backends would be incredibly helpful.