Allow support for ACM SSL cert for publicly exposed services.

[JohnPreston]

Is your feature request related to a problem? Please describe.

• When I already have a public DNS Zone, I provide with its ID
• I indicate what public hostname I would like the family/service to be published on
• ACM creates a public certificate for it that gets automatically validated by Route53 record.
• If I already have a public DNS Namespace I pass the namespace ID and the service gets registered there whereas the
  certificate is added to the route53 zone.

ACM properties page

Describe the solution you'd like

x-acm:
  publicApp:
    Properties: {}
    Settings: {}
    Services:
      - name: serviceA
        ports: [443]

services:
  serviceA:
    x-configs:
      network:
        lb_type: application
        is_public: True

[JohnPreston]

See https://nightly.docs.ecs-composex.lambda-my-aws.io/modules_syntax.html#acm-syntax-reference