Add support for specifying container hostname

[kyzooghost]

Address #883

Added TestContainer.withHostname() and StartedTestContainer.getHostname()

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[cristianrgreco]

@kyzooghost Pls add an example to the docs, in containers.md

[kyzooghost]

@kyzooghost Pls add an example to the docs, in containers.md

added with a cautionary note, please check :)

[cristianrgreco]

@kyzooghost The build is failing.

Probably the AbstractStartedContainer no longer fully implements the StartedTestContainer interface

[kyzooghost]

@kyzooghost The build is failing.

Probably the AbstractStartedContainer no longer fully implements the StartedTestContainer interface

Will look into it when I can :)

[kyzooghost]

@cristianrgreco pushed another commit with AbstractStartedContainer.getHostname() method

Ran npm run build -ws on my local and it looks good to me

[kyzooghost]

@cristianrgreco I see that this one test in the CI failed - https://github.com/testcontainers/testcontainers-node/actions/runs/12929145591/job/36061082486?pr=889

Is this a flaky test 🥲?