// option1
- field: productionHostRoot
  label: Production Root Host Name (e.g. mydomain.com) - this must be the root of the chosen domain, not a subdomain.
  fieldValidation:
    - type: regex
    - value: '^\d{3}-\d{2}-\d{4}$'


- field: productionHostRoot
  label: Production Root Host Name (e.g. mydomain.com) - this must be the root of the chosen domain, not a subdomain.
  fieldValidation:
    - type: function
    - value: function_name_goes_here

VS

// option 2
- field: productionHostRoot
  label: Production Root Host Name (e.g. mydomain.com) - this must be the root of the chosen domain, not a subdomain.
  pattern: regex_goes_here

- field: productionHostRoot
  label: Production Root Host Name (e.g. mydomain.com) - this must be the root of the chosen domain, not a subdomain.
  validationFunction: function_name_goes_here