Automated encryption (SSL/TLS)

From the service dashboard, click on "Security" tab, then click on "Manage SSL Domains"

From there you can manage allowed domains for SSL. If you want to add a new domain, juste type it and press enter to add it to the list of authorized domains. You will also need to create a DNS entry to point your domain to the IP address of your service.

You can either create a A record or CNAME record to point to your service. CNAME is prefered as it won't change even if your IP change (eg: this can happen if your clone/migrate your service to another provider.