(ecs): add a portMappings prop to ContainerDefinition

[misterjoshua]

I'd like to allow the user to define port mappings when adding containers to a task definition.

Use Case

This would allow users to add containers in a more declarative fashion.

Proposed Solution

Add an optional portMappings prop to ContainerDefinitionOptions and have ContainerDefinition add the port mappings at construction time. After, I'd be able to do this:

taskDefinition.addContainer('cont', {
  image: ecs.ContainerImage.fromRegistry('test'),
  memoryLimitMiB: 1024,
  // New option:
  portMappings: [{ containerPort: 80 }],
});

• 👋 I may be able to implement this feature request
• ⚠️ This feature might incur a breaking change

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This is a 🚀 Feature Request

[github-actions]

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