Implement support for specifying the protocol when exposing ports

[technocidal]

Relates to #556.

Follows the commonly known Docker format for specifying ports with a protocol. Backwards compatibility has been tested. If no protocol is specified, it'll default to tcp which is all that was possible with testcontainers-node up until now anyway.

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[technocidal]

@cristianrgreco I'll hopefully get this into a publishable state very soon. It's currently logging way too much and some stuff needs cleaning up. I'm however using this version already at my job (telephony/voice engineering where UDP is quite important) for integration testing and it works quite well! Thanks for your patience.

[cristianrgreco]

@technocidal No problem at all. Thanks for working on it! Let me know if if there's anything I can help with

[cristianrgreco]

Looks like there’s a compilation issue

[technocidal]

Looks like there’s a compilation issue

Should be addressed in the latest commit

[cristianrgreco]

Thanks @technocidal for your contribution, and patience with reviewing the PR!

[technocidal]

@cristianrgreco And thanks for your patience with all of my little mistakes and oversights and especially for your valuable feedback. Have a nice weekend!