Use Heroku with register.com

I have a free app hosted on Heroku, and a domain on register.com. How can I connect the two? I am OK with using any service or addon, as long as it is free. The only stipulation is that I can not spend ANY money. I also want开发者_JAVA技巧 to be able to have an m subdomain for a mobile site. Thanks

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Follow the instructions to configure custom domains.

You just need to install the free custom_domains addon.

$ heroku addons:add custom_domains

Then add the domains

$ heroku domains:add www.example.com

Then, don't forget to update the DNS settings on your domain provider to point to Heroku IP.