chore: use ephemeral free port

[pihme]

Description

Now uses a free ephemeral port by default

Related issues

closes #366

Definition of Done

Code changes:

• The changes are backwards compatibility with previous versions
• If it fixes a bug then PRs are created to backport the fix

Testing:

• There are unit/integration tests that verify all acceptance criterias of the issue
• New tests are written to ensure backwards compatibility with further versions
• The behavior is tested manually

Documentation:

• Javadoc has been written
• The documentation is updated

[github-actions]

Unit Test Results

  44 files    44 suites   1m 19s ⏱️
104 tests 104 ✔️ 0 💤 0 ❌
331 runs  331 ✔️ 0 💤 0 ❌

Results for commit dcbd94f.

[saig0]

@pihme nice 👍