Enable Port Binding/Mapping

[Mcrich23]

Closes #18

With Apple container 0.3, port mapping was re-introduced to their tool. Now I am finally re-enabling it in here.

One note is that it binds to 0.0.0.0 for compatibility reasons, so be careful when exposing to the internet.

[Copilot]

Pull Request Overview

This PR re-enables port binding/mapping functionality in the container compose tool, leveraging the reintroduction of port mapping in Apple container 0.3. The implementation binds to 0.0.0.0 for compatibility, with a security advisory to be cautious about internet exposure.

Key Changes:

• Restored port mapping functionality by uncommenting and updating previously removed code
• Updated port binding to use 0.0.0.0 prefix for compatibility
• Minor variable mutability correction (var to let)

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