Healthcheck doesn't work if port is specified as "--port XXXX" instead of "--port=XXXX"

[ChristianSchenk711]

As part of #3618 a healthcheck.sh script was introduced which parses the used port from the "--port=XXXX" command line argument.

That doesn't work if the port is specified as "--port XXXX".

Workaround is obviously to pass the argument as "--port=XXXX", but probably the script should be able to properly parse the possible variants for the invocation.

[github-actions]

This issue is stale because it has been open 90 days with no activity. This issue will be closed in 30 days unless new comments are made or the stale label is removed. To skip these checks, apply the "lifecycle/frozen" label.