Step 2 - Staging environment: are you on Pro or Starter?
Pro: Submit a request to add the domain to Fastly, Nginx, and configure the SSL certificate (as well as the Sendgrid domain, if necessary). Once that has been configured, update the DNS configuration with development settings.
NOTE
You can add the new domain to Fastly yourself by updating the configuration in the Admin in Stores > Configuration > Advanced > System > Full Page Cache > Fastly Configuration > Domains as in Manage domains in our user guide.
Starter: Custom domains are not supported.
Step 3 - Production environment: are you on Pro or Starter?
Pro: Submit a request to add the domain to Fastly, Nginx, and configure the SSL certificate (as the Sendgrid domain, if necessary). Once that has been configured, continue to Step 4.
NOTE
You can add the new domain to Fastly yourself by updating the configuration in the Admin in Stores > Configuration > Advanced > System > Full Page Cache > Fastly Configuration > DomainsManage domains in our user guide.
Starter: Add the domain to your project in the Domains tab, then submit a request to provide the ACME Challenge Key for the SSL certificate.