问题
The service (c9.io) is great, but I've been looking through the site and can't find the option to have my own domain instead of the automatic subdomain they assign (I don't necessarily mean free).
回答1:
No, you can't. It's a dev environment, so the workspace will also be shutdown at some point if no-one is logged in. Easiest is to deploy to f.e. Heroku or DigitalOcean.
来源：https://stackoverflow.com/questions/25581600/can-i-use-my-own-domain-with-c9-io