feat: Add Socat container implementation

[eddumelendez]

What does this PR do?

This PR adds an utility SocatContainer that can serve as a proxy to other containers.

Why is it important?

• connect to the Docker Model Runner
• Testcontainers for Java also use it at compose implementation, making service ports available at random ports instead of the ones defined at compose definition.

Related issues

N/A

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[HofmeisterAn]

Hey Eddú, thanks for the PR. While reviewing, I noticed two issues. One of them seems like a bug we hadn't caught before.

• Usually, the builders don't need to handle merging any values. That's automatically done by the underlying implementation. It looks like a constraint prevented that for the SocatConfiguration class. See my changes in BuildConfiguration.
• I think we can remove exposing the port 8080 for the hello world container. I think all traffic should go through Socat and the Docker network.

If you're good with these changes, I'm happy to merge the PR.

[HofmeisterAn]

It looks like there is an issue pulling images from icr.io, probably a temporary issue.

[eddumelendez]

Hi @HofmeisterAn, thank you so much for all the improvements! learned so much by submitting this PR. 🚀