/). The name
segment is required and must be 63 characters or less, beginning and ending with an alphanumeric character
([a-z0-9A-Z]) with dashes (-), underscores (_), dots (.), and
alphanumerics between. The prefix is optional. If specified, the prefix must be a DNS subdomain: a series of DNS
labels separated by dots (.), not longer than 253 characters in total, followed by a slash (/).